[Matplotlib-users] Need assistance with inconsistent matplotlib plots from computer to computer...

[Anthony Billings]

The data is sampled from an external device based on the speed (rpms) of a spinning platen. The y-axis values are just set up by a function to adjust according to the range of the sampled data.
As I mentioned in the OP the program works well on most computers. It’s just this HP, i5 10th gen I’m having trouble with. It may or may not be a matplotlib issue, but I don’t know what else it could be.
I was referred to trying to change the epoch in matplotlib 3.3.2 and seeing if I could get it to work there. That did not fix the issue either.


From: Matplotlib-users <matplotlib-users-bounces+abillings=axustech.com at python.org> On Behalf Of Fabrice Silva
Sent: Monday, September 21, 2020 12:07 PM
To: matplotlib-users at python.org
Subject: Re: [Matplotlib-users] Need assistance with inconsistent matplotlib plots from computer to computer...

Le lundi 21 septembre 2020, Anthony Billings a écrit :

I wrote a program that gathers data and plots it (y) over time (x). I use Python 3.7.7, with matplotlib 3.2.2, on Windows 10 Pro. I have compiled the program using pyinstaller, into an .exe and put it on additional computers to run. The program has worked properly on all computers, except an HP i5, running Windows 10. I've attached a picture of both graphs to help explain my problem... Good and Bad Graph<https://imgur.com/gallery/f08CiJZ>.

The bad graph seems to display the data sporadically with long horizontal lines between data points. I have created a debug version that displays the data of the lists used for the x and y-axis and the lists are full with 80-110 values, so I know the data is being collected. It's just not displaying on the graph properly. I have tried uninstalling things and installing things, I have tweaked the priority in Task Manager, and I've tried running in SAFE mode to disable any extensions that may be interrupting in the background. Does anyone have ANY ideas or help? Thank you in advance!

I have now tried installing Python 3.7.7 on the computer that displays the bad graph, and running the program directly from Python IDE and the display is still inaccurate. I'm at a total loss and would LOVE some help.

Hi,
Comparing the two plots, I am not sure matplotlib is the faulty one here.
The y values just seem different between the two graphs. Did you tried to record the data and look at numerical values in order to check their consistency ? You may even transfer the data of the "bad plot" to the other computer (the good one), just to ensure whether it is a data problem or a plot problem...

If they come from some experimental setup, maybe one of the devices is wrong...

Fabrice
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