From andreas.schuldei at th-luebeck.de Wed Dec 2 16:29:01 2020 From: andreas.schuldei at th-luebeck.de (Schuldei, Andreas) Date: Wed, 2 Dec 2020 21:29:01 +0000 Subject: [SciPy-User] Help coding some math i have little understanding of Message-ID: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> I want to 3d plot the magnetic field of a twisted three phase cable, and found a paper giving the analytical solution of the field like this. There are more details in the paper, of course. Now I dont feel confident with this kind of math. Where can i find someone willing to help me with this? Its research in university, no coorporation involved. I would need help writing code representing these equations in python, calculating the field`s vecors in one point r, phi. I dont ask that you do the work for me, I am not dense either. its just that i dont even know where to start with this math. Who ever wants to have a look at the whole paper for further details, it is . -------------- next part -------------- An HTML attachment was scrubbed... URL: From charlesr.harris at gmail.com Thu Dec 3 16:34:40 2020 From: charlesr.harris at gmail.com (Charles R Harris) Date: Thu, 3 Dec 2020 14:34:40 -0700 Subject: [SciPy-User] NumPy 1.20.0rc1 released Message-ID: Hi All, On behalf of the NumPy team I am pleased to announce the release of NumPy 1.20.0rc1. This NumPy release is the largest to date, containing some 654 merged pull requests contributed by 182 people. See the list of highlights below. The Python versions supported for this release are 3.7-3.9, support for Python 3.6 has been dropped. Wheels can be downloaded from PyPI ; source archives, release notes, and wheel hashes are available on Github . Linux users will need pip >= 0.19.3 in order to install manylinux2010 and manylinux2014 wheels. *Highlights* - Annotations for NumPy functions. This work is ongoing and improvements can be expected pending feedback from users. - Wider use of SIMD to increase execution speed of ufuncs. Much work has been done in introducing universal functions that will ease use of modern features across different hardware platforms. This work is ongoing. - Preliminary work in changing the dtype and casting implementations in order to provide an easier path to extending dtypes. This work is ongoing but enough has been done to allow experimentation and feedback. - Extensive documentation improvements comprising some 185 PR merges. This work is ongoing and part of the larger project to improve NumPy's online presence and usefulness to new users. - Further cleanups related to removing Python 2.7. This improves code readability and removes technical debt. - Preliminary support for the upcoming Cython 3.0. *Contributors* A total of 182 people contributed to this release. People with a "+" by their names contributed a patch for the first time. - Aaron Meurer + - Abhilash Barigidad + - Abhinav Reddy + - Abhishek Singh + - Al-Baraa El-Hag + - Albert Villanova del Moral + - Alex Leontiev + - Alex Rockhill + - Alex Rogozhnikov - Alexander Belopolsky - Alexander Kuhn-Regnier + - Allen Downey + - Andras Deak - Andrea Olivo andryandrew at gmail.com andryandrew + - Andrew Eckart + - Anirudh Subramanian - Anthony Byuraev + - Antonio Larrosa + - Ashutosh Singh + - Bangcheng Yang + - Bas van Beek + - Ben Derrett + - Ben Elliston + - Ben Nathanson + - Bharat Medasani + - Bharat Raghunathan - Bijesh Mohan + - Bradley Dice + - Brandon David + - Brandt Bucher - Brian Soto + - Brigitta Sipocz - Cameron Blocker + - Carl Leake + - Charles Harris - Chris Brown + - Chris Vavaliaris + - Chunlin Fang - CloseChoice + - Daniel G. A. Smith + - Daniel Hrisca - Daniel Vanzo + - David Pitchford + - Davide Dal Bosco + - Dima Kogan + - Dmitry Kutlenkov + - Douglas Fenstermacher + - Dustin Spicuzza + - E. Madison Bray + - Elia Franzella + - Enrique Mat?as S?nchez (Quique) + - Erfan Nariman | Veneficus + - Eric Larson - Eric Moore - Eric Wieser - Erik M. Bray - EthanCJ-git + - Etienne Guesnet + - Felix Divo - Frankie Robertson + - Ganesh Kathiresan - Gengxin Xie - Gerry Manoim + - Guilherme Leobas - Hassan Kibirige - Hugo Mendes + - Hugo van Kemenade - Ian Thomas + - InessaPawson + - Isabela Presedo-Floyd + - Isuru Fernando - Jakob Jacobson + - Jakob Jakobson + - Jakub Wilk - James Myatt + - Jesse Li + - John Hagen + - John Zwinck - Joseph Fox-Rabinovitz - Josh Wilson - Jovial Joe Jayarson + - Julia Signell + - Jun Kudo + - Karan Dhir + - Kaspar Thommen + - Kerem Halla? - Kevin Moore + - Kevin Sheppard - Klaus Zimmermann + - LSchroefl + - Laurie + - Laurie Stephey + - Levi Stovall + - Lisa Schwetlick + - Lukas Geiger + - Madhulika Jain Chambers + - Matthias Bussonnier - Matti Picus - Melissa Weber Mendon?a - Michael Hirsch - Nick R. Papior - Nikola Forr? - Noman Arshad + - Paul YS Lee + - Pauli Virtanen - Pawe? Redzy?ski + - Peter Andreas Entschev - Peter Bell - Philippe Ombredanne + - Phoenix Meadowlark + - Piotr Gai?ski - Raghav Khanna + - Raghuveer Devulapalli - Rajas Rade + - Rakesh Vasudevan - Ralf Gommers - Raphael Kruse + - Rashmi K A + - Robert Kern - Rohit Sanjay + - Roman Yurchak - Ross Barnowski - Royston E Tauro + - Ryan C Cooper + - Ryan Soklaski - Safouane Chergui + - Sahil Siddiq + - Sarthak Vineet Kumar + - Sayed Adel - Sebastian Berg - Sergei Vorfolomeev + - Seth Troisi - Sidhant Bansal + - Simon Gasse - Simon Graham + - Stefan Appelhoff + - Stefan Behnel + - Stefan van der Walt - Steve Dower - Steve Joachim + - Steven Pitman + - Stuart Archibald - Sturla Molden - Susan Chang + - Takanori H + - Tapajyoti Bose + - Thomas A Caswell - Tina Oberoi - Tirth Patel - Tobias Pitters + - Tyler Reddy - Veniamin Petrenko + - Wansoo Kim + - Warren Weckesser - Wei Yang + - Wojciech Rzadkowski - Yang Hau + - Yogesh Raisinghani + - Yu Feng - Yuya Unno + - Zac Hatfield-Dodds - Zuhair Ali-Khan + - @abhilash42 + - @bernie gray + - @danbeibei + - @dojafrat - @dpitch40 + - @forfun + - @iamsoto + - @jbrockmendel + - @leeyspaul + - @mitch + - @prateek arora + - @qiyu8 + - @serge-sans-paille + - @skywalker + - @stphnlyd + - @xoviat - @??? + - @JMFT + - @Jack + - @Neal C + Cheers, Charles Harris -------------- next part -------------- An HTML attachment was scrubbed... URL: From robert.kern at gmail.com Fri Dec 4 17:16:08 2020 From: robert.kern at gmail.com (Robert Kern) Date: Fri, 4 Dec 2020 17:16:08 -0500 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> Message-ID: On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas < andreas.schuldei at th-luebeck.de> wrote: > I want to 3d plot the magnetic field of a twisted three phase cable, and > found a paper giving the analytical solution of the field like > this . > > There are more details in the paper, of course. Now I dont feel confident > with this kind of math. Where can i find someone willing to help me with > this? Its research in university, no coorporation involved. I would need > help writing code representing these equations in python, calculating the > field`s vecors in one point r, phi. I dont ask that you do the work for me, > I am not dense either. its just that i dont even know where to start with > this math. > > > Who ever wants to have a look at the whole paper for further details, it > is > > > . > Hi Andreas, The link to the whole paper didn't make it through. We would need to see that for enough context to help. Spherical coordinates have an overabundance of notational conventions, so we'd need to see the whole text to see what they intended. -- Robert Kern -------------- next part -------------- An HTML attachment was scrubbed... URL: From david.mikolas1 at gmail.com Fri Dec 4 22:13:49 2020 From: david.mikolas1 at gmail.com (David Mikolas) Date: Sat, 5 Dec 2020 11:13:49 +0800 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> Message-ID: Not the same paper but looks pretty similar, both links seem to show the same paper. https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 It's an infinite series solution and with Br and Bphi one can construct the whole 3D vector field because Bz is almost the same as Bphi in this case. In addition to here, you could also consider posting an answer in Electronics Stack Exchange, but have a look around first, questions need to be supported with all links, you should mention python and explain how far you've gotten and where you're stuck. On Sat, Dec 5, 2020 at 6:17 AM Robert Kern wrote: > On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas < > andreas.schuldei at th-luebeck.de> wrote: > >> I want to 3d plot the magnetic field of a twisted three phase cable, and >> found a paper giving the analytical solution of the field like >> this . >> >> There are more details in the paper, of course. Now I dont feel confident >> with this kind of math. Where can i find someone willing to help me with >> this? Its research in university, no coorporation involved. I would need >> help writing code representing these equations in python, calculating the >> field`s vecors in one point r, phi. I dont ask that you do the work for me, >> I am not dense either. its just that i dont even know where to start with >> this math. >> >> >> Who ever wants to have a look at the whole paper for further details, it >> is >> >> >> . >> > Hi Andreas, > > The link to the whole paper didn't make it through. We would need to see > that for enough context to help. Spherical coordinates have an > overabundance of notational conventions, so we'd need to see the whole text > to see what they intended. > > -- > Robert Kern > _______________________________________________ > SciPy-User mailing list > SciPy-User at python.org > https://mail.python.org/mailman/listinfo/scipy-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreas.schuldei at th-luebeck.de Sat Dec 5 04:39:26 2020 From: andreas.schuldei at th-luebeck.de (Schuldei, Andreas) Date: Sat, 5 Dec 2020 09:39:26 +0000 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> , Message-ID: <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de> Thank you for looking into this. I am in the process of working thought the referenced paper by frank Haber from 1974. It is actually good at mentioning the single steps of the math. But apart from the juggling with terms of the bessel functions, I notice that I need an introduction into *coding* with bessel functions. E.g.: For infinte sums, do I need to iterate over the orders of the Bessel functions and add them up until I am satisfied with my accuracy? It seems to be an unpopular topic and the ones that know might find it obvious and dont blog or youtube about it. So my problem starts out rather basic. most likely more come once i understand more - such is the nature of learning ? ________________________________ Von: SciPy-User im Auftrag von David Mikolas Gesendet: Samstag, 5. Dezember 2020 04:13:49 An: SciPy Users List Betreff: Re: [SciPy-User] Help coding some math i have little understanding of Not the same paper but looks pretty similar, both links seem to show the same paper. https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 It's an infinite series solution and with Br and Bphi one can construct the whole 3D vector field because Bz is almost the same as Bphi in this case. In addition to here, you could also consider posting an answer in Electronics Stack Exchange, but have a look around first, questions need to be supported with all links, you should mention python and explain how far you've gotten and where you're stuck. On Sat, Dec 5, 2020 at 6:17 AM Robert Kern > wrote: On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas > wrote: I want to 3d plot the magnetic field of a twisted three phase cable, and found a paper giving the analytical solution of the field like this. There are more details in the paper, of course. Now I dont feel confident with this kind of math. Where can i find someone willing to help me with this? Its research in university, no coorporation involved. I would need help writing code representing these equations in python, calculating the field`s vecors in one point r, phi. I dont ask that you do the work for me, I am not dense either. its just that i dont even know where to start with this math. Who ever wants to have a look at the whole paper for further details, it is . Hi Andreas, The link to the whole paper didn't make it through. We would need to see that for enough context to help. Spherical coordinates have an overabundance of notational conventions, so we'd need to see the whole text to see what they intended. -- Robert Kern _______________________________________________ SciPy-User mailing list SciPy-User at python.org https://mail.python.org/mailman/listinfo/scipy-user -------------- next part -------------- An HTML attachment was scrubbed... URL: From david.mikolas1 at gmail.com Sat Dec 5 19:40:39 2020 From: david.mikolas1 at gmail.com (David Mikolas) Date: Sun, 6 Dec 2020 08:40:39 +0800 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de> References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de> Message-ID: Yes, I think this is not a question about SciPy at all, but about how to write a python program using these equations. If you can use some Python then I will find some place in Stack Exchange and get a question started for you, then link back here. Does that sound useful to you? On Sat, Dec 5, 2020 at 5:55 PM Schuldei, Andreas < andreas.schuldei at th-luebeck.de> wrote: > Thank you for looking into this. I am in the process of working thought > the referenced paper by frank Haber from 1974. It is actually good at > mentioning the single steps of the math. > > But apart from the juggling with terms of the bessel functions, I notice > that I need an introduction into *coding* with bessel functions. E.g.: For > infinte sums, do I need to iterate over the orders of the Bessel functions > and add them up until I am satisfied with my accuracy? It seems to be an > unpopular topic and the ones that know might find it obvious and dont blog > or youtube about it. So my problem starts out rather basic. most likely > more come once i understand more - such is the nature of learning ? > ------------------------------ > *Von:* SciPy-User th-luebeck.de at python.org> im Auftrag von David Mikolas < > david.mikolas1 at gmail.com> > *Gesendet:* Samstag, 5. Dezember 2020 04:13:49 > *An:* SciPy Users List > *Betreff:* Re: [SciPy-User] Help coding some math i have little > understanding of > > Not the same paper but looks pretty similar, both links seem to show the > same paper. > > https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf > https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 > > > It's an infinite series solution and with Br and Bphi one can construct > the whole 3D vector field because Bz is almost the same as Bphi in this > case. > > In addition to here, you could also consider posting an answer in > Electronics Stack Exchange, but have a look around first, questions need to > be supported with all links, you should mention python and explain how far > you've gotten and where you're stuck. > > > > > On Sat, Dec 5, 2020 at 6:17 AM Robert Kern wrote: > >> On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas < >> andreas.schuldei at th-luebeck.de> wrote: >> >>> I want to 3d plot the magnetic field of a twisted three phase cable, and >>> found a paper giving the analytical solution of the field like >>> this . >>> >>> >>> There are more details in the paper, of course. Now I dont feel >>> confident with this kind of math. Where can i find someone willing to help >>> me with this? Its research in university, no coorporation involved. I would >>> need help writing code representing these equations in python, calculating >>> the field`s vecors in one point r, phi. I dont ask that you do the work for >>> me, I am not dense either. its just that i dont even know where to start >>> with this math. >>> >>> >>> Who ever wants to have a look at the whole paper for further details, it >>> is >>> >>> >>> . >>> >> Hi Andreas, >> >> The link to the whole paper didn't make it through. We would need to see >> that for enough context to help. Spherical coordinates have an >> overabundance of notational conventions, so we'd need to see the whole text >> to see what they intended. >> >> -- >> Robert Kern >> _______________________________________________ >> SciPy-User mailing list >> SciPy-User at python.org >> https://mail.python.org/mailman/listinfo/scipy-user >> > _______________________________________________ > SciPy-User mailing list > SciPy-User at python.org > https://mail.python.org/mailman/listinfo/scipy-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreas.schuldei at th-luebeck.de Sun Dec 6 05:01:12 2020 From: andreas.schuldei at th-luebeck.de (Schuldei, Andreas) Date: Sun, 6 Dec 2020 10:01:12 +0000 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de>, Message-ID: <335da5ebb6ab4117b63ddd04c784b13c@th-luebeck.de> yes, certainly. I have been coding python for a little while now. just to clarify: you start the question on stack exchange? I could start it, too, with my equation as an example (i got the wrong one in my post initally, too). But Stackexchange does prefer general questions that can be re-applied widely over specific ones ("how do i solve *this*?"). I fear if i came with my equations it would be too specific. ________________________________ Von: SciPy-User im Auftrag von David Mikolas Gesendet: Sonntag, 6. Dezember 2020 01:40:39 An: SciPy Users List Betreff: Re: [SciPy-User] Help coding some math i have little understanding of Yes, I think this is not a question about SciPy at all, but about how to write a python program using these equations. If you can use some Python then I will find some place in Stack Exchange and get a question started for you, then link back here. Does that sound useful to you? On Sat, Dec 5, 2020 at 5:55 PM Schuldei, Andreas > wrote: Thank you for looking into this. I am in the process of working thought the referenced paper by frank Haber from 1974. It is actually good at mentioning the single steps of the math. But apart from the juggling with terms of the bessel functions, I notice that I need an introduction into *coding* with bessel functions. E.g.: For infinte sums, do I need to iterate over the orders of the Bessel functions and add them up until I am satisfied with my accuracy? It seems to be an unpopular topic and the ones that know might find it obvious and dont blog or youtube about it. So my problem starts out rather basic. most likely more come once i understand more - such is the nature of learning ? ________________________________ Von: SciPy-User > im Auftrag von David Mikolas > Gesendet: Samstag, 5. Dezember 2020 04:13:49 An: SciPy Users List Betreff: Re: [SciPy-User] Help coding some math i have little understanding of Not the same paper but looks pretty similar, both links seem to show the same paper. https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 It's an infinite series solution and with Br and Bphi one can construct the whole 3D vector field because Bz is almost the same as Bphi in this case. In addition to here, you could also consider posting an answer in Electronics Stack Exchange, but have a look around first, questions need to be supported with all links, you should mention python and explain how far you've gotten and where you're stuck. On Sat, Dec 5, 2020 at 6:17 AM Robert Kern > wrote: On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas > wrote: I want to 3d plot the magnetic field of a twisted three phase cable, and found a paper giving the analytical solution of the field like this. There are more details in the paper, of course. Now I dont feel confident with this kind of math. Where can i find someone willing to help me with this? Its research in university, no coorporation involved. I would need help writing code representing these equations in python, calculating the field`s vecors in one point r, phi. I dont ask that you do the work for me, I am not dense either. its just that i dont even know where to start with this math. Who ever wants to have a look at the whole paper for further details, it is . Hi Andreas, The link to the whole paper didn't make it through. We would need to see that for enough context to help. Spherical coordinates have an overabundance of notational conventions, so we'd need to see the whole text to see what they intended. -- Robert Kern _______________________________________________ SciPy-User mailing list SciPy-User at python.org https://mail.python.org/mailman/listinfo/scipy-user _______________________________________________ SciPy-User mailing list SciPy-User at python.org https://mail.python.org/mailman/listinfo/scipy-user -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreas.schuldei at th-luebeck.de Sun Dec 6 07:08:14 2020 From: andreas.schuldei at th-luebeck.de (Schuldei, Andreas) Date: Sun, 6 Dec 2020 12:08:14 +0000 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: <335da5ebb6ab4117b63ddd04c784b13c@th-luebeck.de> References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de>, , <335da5ebb6ab4117b63ddd04c784b13c@th-luebeck.de> Message-ID: now i tried to phrase my question in a broad way, detailing some questions that stick out. Here is the link: https://stackoverflow.com/questions/65167847/how-to-use-bessel-functions-when-implementing-math-equations ________________________________ Von: Schuldei, Andreas Gesendet: Sonntag, 6. Dezember 2020 11:01:12 An: SciPy Users List Betreff: AW: [SciPy-User] Help coding some math i have little understanding of yes, certainly. I have been coding python for a little while now. just to clarify: you start the question on stack exchange? I could start it, too, with my equation as an example (i got the wrong one in my post initally, too). But Stackexchange does prefer general questions that can be re-applied widely over specific ones ("how do i solve *this*?"). I fear if i came with my equations it would be too specific. ________________________________ Von: SciPy-User im Auftrag von David Mikolas Gesendet: Sonntag, 6. Dezember 2020 01:40:39 An: SciPy Users List Betreff: Re: [SciPy-User] Help coding some math i have little understanding of Yes, I think this is not a question about SciPy at all, but about how to write a python program using these equations. If you can use some Python then I will find some place in Stack Exchange and get a question started for you, then link back here. Does that sound useful to you? On Sat, Dec 5, 2020 at 5:55 PM Schuldei, Andreas > wrote: Thank you for looking into this. I am in the process of working thought the referenced paper by frank Haber from 1974. It is actually good at mentioning the single steps of the math. But apart from the juggling with terms of the bessel functions, I notice that I need an introduction into *coding* with bessel functions. E.g.: For infinte sums, do I need to iterate over the orders of the Bessel functions and add them up until I am satisfied with my accuracy? It seems to be an unpopular topic and the ones that know might find it obvious and dont blog or youtube about it. So my problem starts out rather basic. most likely more come once i understand more - such is the nature of learning ? ________________________________ Von: SciPy-User > im Auftrag von David Mikolas > Gesendet: Samstag, 5. Dezember 2020 04:13:49 An: SciPy Users List Betreff: Re: [SciPy-User] Help coding some math i have little understanding of Not the same paper but looks pretty similar, both links seem to show the same paper. https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 It's an infinite series solution and with Br and Bphi one can construct the whole 3D vector field because Bz is almost the same as Bphi in this case. In addition to here, you could also consider posting an answer in Electronics Stack Exchange, but have a look around first, questions need to be supported with all links, you should mention python and explain how far you've gotten and where you're stuck. On Sat, Dec 5, 2020 at 6:17 AM Robert Kern > wrote: On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas > wrote: I want to 3d plot the magnetic field of a twisted three phase cable, and found a paper giving the analytical solution of the field like this. There are more details in the paper, of course. Now I dont feel confident with this kind of math. Where can i find someone willing to help me with this? Its research in university, no coorporation involved. I would need help writing code representing these equations in python, calculating the field`s vecors in one point r, phi. I dont ask that you do the work for me, I am not dense either. its just that i dont even know where to start with this math. Who ever wants to have a look at the whole paper for further details, it is . Hi Andreas, The link to the whole paper didn't make it through. We would need to see that for enough context to help. Spherical coordinates have an overabundance of notational conventions, so we'd need to see the whole text to see what they intended. -- Robert Kern _______________________________________________ SciPy-User mailing list SciPy-User at python.org https://mail.python.org/mailman/listinfo/scipy-user _______________________________________________ SciPy-User mailing list SciPy-User at python.org https://mail.python.org/mailman/listinfo/scipy-user -------------- next part -------------- An HTML attachment was scrubbed... URL: From winash12 at gmail.com Sun Dec 6 08:01:10 2020 From: winash12 at gmail.com (ashwin .D) Date: Sun, 6 Dec 2020 18:31:10 +0530 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de> <335da5ebb6ab4117b63ddd04c784b13c@th-luebeck.de> Message-ID: SO may not be the site you are looking for. You need a more specific site. In the past when I have had questions like that I have preferred to go here - https://scicomp.stackexchange.com/ - Computational Science Stack Exchange. That site deals with numerical programming(in a language agnostic way) and actually helps by providing a numerical technique that will help you. But to me that question the way it is asked is way too broad and may end up being closed. You need to focus and then maybe ask a series of question each of which leads to the next. On Sun, Dec 6, 2020 at 5:54 PM Schuldei, Andreas < andreas.schuldei at th-luebeck.de> wrote: > now i tried to phrase my question in a broad way, detailing some questions > that stick out. Here is the link: > https://stackoverflow.com/questions/65167847/how-to-use-bessel-functions-when-implementing-math-equations > ------------------------------ > *Von:* Schuldei, Andreas > *Gesendet:* Sonntag, 6. Dezember 2020 11:01:12 > *An:* SciPy Users List > *Betreff:* AW: [SciPy-User] Help coding some math i have little > understanding of > > > yes, certainly. I have been coding python for a little while now. just to > clarify: you start the question on stack exchange? I could start it, too, > with my equation as an example (i got the wrong one in my post initally, > too). But Stackexchange does prefer general questions that can be > re-applied widely over specific ones ("how do i solve *this*?"). I fear if > i came with my equations it would be too specific. > ------------------------------ > *Von:* SciPy-User th-luebeck.de at python.org> im Auftrag von David Mikolas < > david.mikolas1 at gmail.com> > *Gesendet:* Sonntag, 6. Dezember 2020 01:40:39 > *An:* SciPy Users List > *Betreff:* Re: [SciPy-User] Help coding some math i have little > understanding of > > Yes, I think this is not a question about SciPy at all, but about how to > write a python program using these equations. > > If you can use some Python then I will find some place in Stack Exchange > and get a question started for you, then link back here. Does that sound > useful to you? > > On Sat, Dec 5, 2020 at 5:55 PM Schuldei, Andreas < > andreas.schuldei at th-luebeck.de> wrote: > >> Thank you for looking into this. I am in the process of working thought >> the referenced paper by frank Haber from 1974. It is actually good at >> mentioning the single steps of the math. >> >> But apart from the juggling with terms of the bessel functions, I notice >> that I need an introduction into *coding* with bessel functions. E.g.: For >> infinte sums, do I need to iterate over the orders of the Bessel functions >> and add them up until I am satisfied with my accuracy? It seems to be an >> unpopular topic and the ones that know might find it obvious and dont blog >> or youtube about it. So my problem starts out rather basic. most likely >> more come once i understand more - such is the nature of learning ? >> ------------------------------ >> *Von:* SciPy-User > th-luebeck.de at python.org> im Auftrag von David Mikolas < >> david.mikolas1 at gmail.com> >> *Gesendet:* Samstag, 5. Dezember 2020 04:13:49 >> *An:* SciPy Users List >> *Betreff:* Re: [SciPy-User] Help coding some math i have little >> understanding of >> >> Not the same paper but looks pretty similar, both links seem to show the >> same paper. >> >> https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf >> https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 >> >> >> It's an infinite series solution and with Br and Bphi one can construct >> the whole 3D vector field because Bz is almost the same as Bphi in this >> case. >> >> In addition to here, you could also consider posting an answer in >> Electronics Stack Exchange, but have a look around first, questions need to >> be supported with all links, you should mention python and explain how far >> you've gotten and where you're stuck. >> >> >> >> >> On Sat, Dec 5, 2020 at 6:17 AM Robert Kern wrote: >> >>> On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas < >>> andreas.schuldei at th-luebeck.de> wrote: >>> >>>> I want to 3d plot the magnetic field of a twisted three phase cable, >>>> and found a paper giving the analytical solution of the field like >>>> this . >>>> >>>> >>>> There are more details in the paper, of course. Now I dont feel >>>> confident with this kind of math. Where can i find someone willing to help >>>> me with this? Its research in university, no coorporation involved. I would >>>> need help writing code representing these equations in python, calculating >>>> the field`s vecors in one point r, phi. I dont ask that you do the work for >>>> me, I am not dense either. its just that i dont even know where to start >>>> with this math. >>>> >>>> >>>> Who ever wants to have a look at the whole paper for further details, >>>> it is >>>> >>>> >>>> . >>>> >>> Hi Andreas, >>> >>> The link to the whole paper didn't make it through. We would need to see >>> that for enough context to help. Spherical coordinates have an >>> overabundance of notational conventions, so we'd need to see the whole text >>> to see what they intended. >>> >>> -- >>> Robert Kern >>> _______________________________________________ >>> SciPy-User mailing list >>> SciPy-User at python.org >>> https://mail.python.org/mailman/listinfo/scipy-user >>> >> _______________________________________________ >> SciPy-User mailing list >> SciPy-User at python.org >> https://mail.python.org/mailman/listinfo/scipy-user >> > _______________________________________________ > SciPy-User mailing list > SciPy-User at python.org > https://mail.python.org/mailman/listinfo/scipy-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: From er.gauravsinha at gmail.com Sun Dec 6 08:30:18 2020 From: er.gauravsinha at gmail.com (gaurav sinha) Date: Sun, 6 Dec 2020 19:00:18 +0530 Subject: [SciPy-User] (no subject) Message-ID: Request you to Unsubscribe from all mail list -------------- next part -------------- An HTML attachment was scrubbed... URL: From david.mikolas1 at gmail.com Mon Dec 7 00:30:42 2020 From: david.mikolas1 at gmail.com (David Mikolas) Date: Mon, 7 Dec 2020 13:30:42 +0800 Subject: [SciPy-User] Help coding some math i have little understanding of In-Reply-To: References: <3524efcf68e245b3a7fea9b5f772a3fb@th-luebeck.de> <8fe0e80059bb4dac981f5629e84a11d8@th-luebeck.de> <335da5ebb6ab4117b63ddd04c784b13c@th-luebeck.de> Message-ID: @ashwin's advice is excellent! I would say just delete that Stack Overflow question. That it remains open and not down voted attests to how much nicer SO is these days than it was in the past! :-) SciComp SE is a great choice. In order to encourage helpful and timely answers keep your question short and limited in scope, You can always ask more follow-up questions. This is how I would ask it based on your SO post. It's just a suggestion and you'll need to check it for errors and use your own words. Here's a screenshot of what the text below would look like https://i.stack.imgur.com/S8kRq.png ======== I'm trying to parse the following expression (Eq. 35 in [The Magnetic Field in the Vicinity of Parallel and Twisted Three-Wire Cable Carrying Balanced Three-Phased Current]( https://drive.google.com/file/d/1eynEkASX77LlTY5nx3pAWNBb6BPTouOK/view)) in Python and calculate its sum over indices (...-5, -2, 1, 4, 7...). [Relations between Bessel functions]( https://www.johndcook.com/blog/bessel_functions/) explains that these are the modified Bessel functions of the first and second kind. **Question:** For $K_m$ I plan to use [scipy.special.kn(n, x)]( https://docs.scipy.org/doc/scipy/reference/generated/scipy.special.kn.html#scipy.special.kn) but for $I_m$ there does not seem to be a method specific for integer orders. Should I just use [scipy.special.iv(v, z)]( https://docs.scipy.org/doc/scipy/reference/generated/scipy.special.iv.html#scipy.special.iv) for real orders with $z=m$? Here is the expression inside the Sum over $m = (...-5, -2, 1, 4, 7...)$ from Equation 35 from the linked paper: $$2 m I_m(\eta_m) K_m\left( \eta_m \frac{r}{a?} \right) + \frac{2 \pi r m q}{p} \left[ I_{m-1}(\eta_m) K_{m-1}\left(\eta_m \frac{r}{a?} \right) + I_{m+1}(\eta_m) K_{m+1}\left( \eta_m \frac{r}{a} \right) \right] \exp[jm(\theta - 2 \pi z/p)]$$ with $r$ and $\theta$ as input parameters and likely to be arrays, and $p, q$ as constant arguments. On Sun, Dec 6, 2020 at 9:01 PM ashwin .D wrote: > SO may not be the site you are looking for. You need a more specific > site. In the past when I have had questions like that I have preferred to > go here - > > https://scicomp.stackexchange.com/ - Computational Science Stack > Exchange. That site deals with numerical programming(in a language agnostic > way) and actually helps by providing a numerical technique that will help > you. > > But to me that question the way it is asked is way too broad and may end > up being closed. You need to focus and then maybe ask a series of question > each of which leads to the next. > > On Sun, Dec 6, 2020 at 5:54 PM Schuldei, Andreas < > andreas.schuldei at th-luebeck.de> wrote: > >> now i tried to phrase my question in a broad way, detailing some >> questions that stick out. Here is the link: >> https://stackoverflow.com/questions/65167847/how-to-use-bessel-functions-when-implementing-math-equations >> ------------------------------ >> *Von:* Schuldei, Andreas >> *Gesendet:* Sonntag, 6. Dezember 2020 11:01:12 >> *An:* SciPy Users List >> *Betreff:* AW: [SciPy-User] Help coding some math i have little >> understanding of >> >> >> yes, certainly. I have been coding python for a little while now. just to >> clarify: you start the question on stack exchange? I could start it, too, >> with my equation as an example (i got the wrong one in my post initally, >> too). But Stackexchange does prefer general questions that can be >> re-applied widely over specific ones ("how do i solve *this*?"). I fear if >> i came with my equations it would be too specific. >> ------------------------------ >> *Von:* SciPy-User > th-luebeck.de at python.org> im Auftrag von David Mikolas < >> david.mikolas1 at gmail.com> >> *Gesendet:* Sonntag, 6. Dezember 2020 01:40:39 >> *An:* SciPy Users List >> *Betreff:* Re: [SciPy-User] Help coding some math i have little >> understanding of >> >> Yes, I think this is not a question about SciPy at all, but about how to >> write a python program using these equations. >> >> If you can use some Python then I will find some place in Stack Exchange >> and get a question started for you, then link back here. Does that sound >> useful to you? >> >> On Sat, Dec 5, 2020 at 5:55 PM Schuldei, Andreas < >> andreas.schuldei at th-luebeck.de> wrote: >> >>> Thank you for looking into this. I am in the process of working thought >>> the referenced paper by frank Haber from 1974. It is actually good at >>> mentioning the single steps of the math. >>> >>> But apart from the juggling with terms of the bessel functions, I notice >>> that I need an introduction into *coding* with bessel functions. E.g.: For >>> infinte sums, do I need to iterate over the orders of the Bessel functions >>> and add them up until I am satisfied with my accuracy? It seems to be an >>> unpopular topic and the ones that know might find it obvious and dont blog >>> or youtube about it. So my problem starts out rather basic. most likely >>> more come once i understand more - such is the nature of learning ? >>> ------------------------------ >>> *Von:* SciPy-User >> th-luebeck.de at python.org> im Auftrag von David Mikolas < >>> david.mikolas1 at gmail.com> >>> *Gesendet:* Samstag, 5. Dezember 2020 04:13:49 >>> *An:* SciPy Users List >>> *Betreff:* Re: [SciPy-User] Help coding some math i have little >>> understanding of >>> >>> Not the same paper but looks pretty similar, both links seem to show the >>> same paper. >>> >>> https://www.ipen.br/biblioteca/cd/ieee/1999/Proceed/00465.pdf >>> https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=667734&tag=1 >>> >>> >>> It's an infinite series solution and with Br and Bphi one can construct >>> the whole 3D vector field because Bz is almost the same as Bphi in this >>> case. >>> >>> In addition to here, you could also consider posting an answer in >>> Electronics Stack Exchange, but have a look around first, questions need to >>> be supported with all links, you should mention python and explain how far >>> you've gotten and where you're stuck. >>> >>> >>> >>> >>> On Sat, Dec 5, 2020 at 6:17 AM Robert Kern >>> wrote: >>> >>>> On Wed, Dec 2, 2020 at 4:45 PM Schuldei, Andreas < >>>> andreas.schuldei at th-luebeck.de> wrote: >>>> >>>>> I want to 3d plot the magnetic field of a twisted three phase cable, >>>>> and found a paper giving the analytical solution of the field like >>>>> this >>>>> . >>>>> >>>>> There are more details in the paper, of course. Now I dont feel >>>>> confident with this kind of math. Where can i find someone willing to help >>>>> me with this? Its research in university, no coorporation involved. I would >>>>> need help writing code representing these equations in python, calculating >>>>> the field`s vecors in one point r, phi. I dont ask that you do the work for >>>>> me, I am not dense either. its just that i dont even know where to start >>>>> with this math. >>>>> >>>>> >>>>> Who ever wants to have a look at the whole paper for further details, >>>>> it is >>>>> >>>>> >>>>> . >>>>> >>>> Hi Andreas, >>>> >>>> The link to the whole paper didn't make it through. We would need to >>>> see that for enough context to help. Spherical coordinates have an >>>> overabundance of notational conventions, so we'd need to see the whole text >>>> to see what they intended. >>>> >>>> -- >>>> Robert Kern >>>> _______________________________________________ >>>> SciPy-User mailing list >>>> SciPy-User at python.org >>>> https://mail.python.org/mailman/listinfo/scipy-user >>>> >>> _______________________________________________ >>> SciPy-User mailing list >>> SciPy-User at python.org >>> https://mail.python.org/mailman/listinfo/scipy-user >>> >> _______________________________________________ >> SciPy-User mailing list >> SciPy-User at python.org >> https://mail.python.org/mailman/listinfo/scipy-user >> > _______________________________________________ > SciPy-User mailing list > SciPy-User at python.org > https://mail.python.org/mailman/listinfo/scipy-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: From ralf.gommers at gmail.com Mon Dec 7 06:40:02 2020 From: ralf.gommers at gmail.com (Ralf Gommers) Date: Mon, 7 Dec 2020 11:40:02 +0000 Subject: [SciPy-User] (no subject) In-Reply-To: References: Message-ID: On Sun, Dec 6, 2020 at 2:31 PM gaurav sinha wrote: > Request you to Unsubscribe from all mail list > Please do that yourself at https://mail.python.org/mailman/listinfo/scipy-user, we cannot do it for you Cheers, Ralf -------------- next part -------------- An HTML attachment was scrubbed... URL: From charlesr.harris at gmail.com Thu Dec 24 22:54:35 2020 From: charlesr.harris at gmail.com (Charles R Harris) Date: Thu, 24 Dec 2020 20:54:35 -0700 Subject: [SciPy-User] NumPy 1.20.0rc2 released Message-ID: Hi All, On behalf of the NumPy team I am pleased to announce the release of NumPy 1.20.0rc2. This NumPy release is the largest to date, containing some 670 merged pull requests contributed by 184 people. See the list of highlights below. The Python versions supported for this release are 3.7-3.9, support for Python 3.6 has been dropped. Wheels can be downloaded from PyPI ; source archives, release notes, and wheel hashes are available on Github . Linux users will need pip >= 0.19.3 in order to install manylinux2010 and manylinux2014 wheels. *Highlights* - Annotations for NumPy functions. This work is ongoing and improvements can be expected pending feedback from users. - Wider use of SIMD to increase execution speed of ufuncs. Much work has been done in introducing universal functions that will ease use of modern features across different hardware platforms. This work is ongoing. - Preliminary work in changing the dtype and casting implementations in order to provide an easier path to extending dtypes. This work is ongoing but enough has been done to allow experimentation and feedback. - Extensive documentation improvements comprising some 185 PR merges. This work is ongoing and part of the larger project to improve NumPy's online presence and usefulness to new users. - Further cleanups related to removing Python 2.7. This improves code readability and removes technical debt. - Preliminary support for the upcoming Cython 3.0. *Contributors* A total of 184 people contributed to this release. People with a "+" by their names contributed a patch for the first time. * Aaron Meurer + * Abhilash Barigidad + * Abhinav Reddy + * Abhishek Singh + * Al-Baraa El-Hag + * Albert Villanova del Moral + * Alex Leontiev + * Alex Rockhill + * Alex Rogozhnikov * Alexander Belopolsky * Alexander Kuhn-Regnier + * Allen Downey + * Andras Deak * Andrea Olivo + * Andrew Eckart + * Anirudh Subramanian * Anthony Byuraev + * Antonio Larrosa + * Ashutosh Singh + * Bangcheng Yang + * Bas van Beek + * Ben Derrett + * Ben Elliston + * Ben Nathanson + * Bernie Gray + * Bharat Medasani + * Bharat Raghunathan * Bijesh Mohan + * Bradley Dice + * Brandon David + * Brandt Bucher * Brian Soto + * Brigitta Sipocz * Cameron Blocker + * Carl Leake + * Charles Harris * Chris Brown + * Chris Vavaliaris + * Christoph Gohlke * Chunlin Fang * CloseChoice + * Daniel G. A. Smith + * Daniel Hrisca * Daniel Vanzo + * David Pitchford + * Davide Dal Bosco + * Derek Homeier * Dima Kogan + * Dmitry Kutlenkov + * Douglas Fenstermacher + * Dustin Spicuzza + * E. Madison Bray + * Elia Franzella + * Enrique Mat?as S?nchez + * Erfan Nariman | Veneficus + * Eric Larson * Eric Moore * Eric Wieser * Erik M. Bray * EthanCJ-git + * Etienne Guesnet + * FX Coudert + * Felix Divo * Frankie Robertson + * Ganesh Kathiresan * Gengxin Xie * Gerry Manoim + * Guilherme Leobas * Hassan Kibirige * Hugo Mendes + * Hugo van Kemenade * Ian Thomas + * InessaPawson + * Isabela Presedo-Floyd + * Isuru Fernando * Jakob Jakobson + * Jakub Wilk * James Myatt + * Jesse Li + * John Hagen + * John Zwinck * Joseph Fox-Rabinovitz * Josh Wilson * Jovial Joe Jayarson + * Julia Signell + * Jun Kudo + * Karan Dhir + * Kaspar Thommen + * Kerem Halla? * Kevin Moore + * Kevin Sheppard * Klaus Zimmermann + * LSchroefl + * Laurie + * Laurie Stephey + * Levi Stovall + * Lisa Schwetlick + * Lukas Geiger + * Madhulika Jain Chambers + * Matthias Bussonnier * Matti Picus * Melissa Weber Mendon?a * Michael Hirsch * Nick R. Papior * Nikola Forr? * Noman Arshad + * Paul YS Lee + * Pauli Virtanen * Pawe? Redzy?ski + * Peter Andreas Entschev * Peter Bell * Philippe Ombredanne + * Phoenix Meadowlark + * Piotr Gai?ski * Raghav Khanna + * Raghuveer Devulapalli * Rajas Rade + * Rakesh Vasudevan * Ralf Gommers * Raphael Kruse + * Rashmi K A + * Robert Kern * Rohit Sanjay + * Roman Yurchak * Ross Barnowski * Royston E Tauro + * Ryan C Cooper + * Ryan Soklaski * Safouane Chergui + * Sahil Siddiq + * Sarthak Vineet Kumar + * Sayed Adel * Sebastian Berg * Sergei Vorfolomeev + * Seth Troisi * Sidhant Bansal + * Simon Gasse * Simon Graham + * Stefan Appelhoff + * Stefan Behnel + * Stefan van der Walt * Steve Dower * Steve Joachim + * Steven Pitman + * Stuart Archibald * Sturla Molden * Susan Chang + * Takanori H + * Tapajyoti Bose + * Thomas A Caswell * Tina Oberoi * Tirth Patel * Tobias Pitters + * Tomoki, Karatsu + * Tyler Reddy * Veniamin Petrenko + * Wansoo Kim + * Warren Weckesser * Wei Yang + * Wojciech Rzadkowski * Yang Hau + * Yogesh Raisinghani + * Yu Feng * Yuya Unno + * Zac Hatfield-Dodds * Zuhair Ali-Khan + * @abhilash42 + * @danbeibei + * @dojafrat * @dpitch40 + * @forfun + * @iamsoto + * @jbrockmendel + * @leeyspaul + * @mitch + * @prateek arora + * @serge-sans-paille + * @skywalker + * @stphnlyd + * @xoviat * @??? + * @JMFT + * @Jack + * @Neal C + Cheers, Charles Harris -------------- next part -------------- An HTML attachment was scrubbed... URL: From cimrman3 at ntc.zcu.cz Sat Dec 26 18:54:50 2020 From: cimrman3 at ntc.zcu.cz (Robert Cimrman) Date: Sun, 27 Dec 2020 00:54:50 +0100 Subject: [SciPy-User] ANN: SfePy 2020.4 Message-ID: <282bf9a7-a3dc-af92-c7ed-9725fa88ca8e@ntc.zcu.cz> I am pleased to announce the release of SfePy 2020.4. Description ----------- SfePy (simple finite elements in Python) is a software for solving systems of coupled partial differential equations by finite element methods. It is distributed under the new BSD license. Home page: https://sfepy.org Mailing list: https://mail.python.org/mm3/mailman3/lists/sfepy.python.org/ Git (source) repository, issue tracker: https://github.com/sfepy/sfepy Highlights of this release -------------------------- - Ogden hyperelastic term - serendipity finite element basis of orders 1-3 For full release notes see [1]. Cheers, Robert Cimrman [1] http://docs.sfepy.org/doc/release_notes.html#id1 --- Contributors to this release in alphabetical order: Robert Cimrman Jan Heczko Vladimir Lukes