[Matplotlib-users] plot with multiple images and colorbar

[Slavin, Jonathan]

Hi Jody,

I'm not explicitly setting the aspect ratio. It's set, I think, by the
shape of the images that are plotted via imshow. Yes, I'd like for the
height of the colorbar to match that of the plots. I am able to get it to
do that by changing the shape of the plotting window, but it'd be nicer if
it worked without having to do that.

It all looks good and works as desired when I use ImageGrid and the axis
limits are all the same, but if I try to use  different ylimits then things
go wrong - even with images that have the same aspect ratio.

Jon

On Tue, May 14, 2019 at 12:02 PM Jody Klymak <jklymak at uvic.ca> wrote:

> Hi Jonathan,
>
> If you are setting the aspect ratio of your subplots, space can be missing
> on the RHS if the setting the aspect ratio causes the subplots to shrink
> horizontally.  The “solution” to this is to make your *figure* more tall
> and less wide until the aspect ratio shrink happens in the vertical instead
> of the horizontal, or don’t set the aspect ratio.  Its pretty hard for
> matplotlib to do this automatically and still do the usual layout for axes
> that do not have their aspect ratio set, the desired behaviour of which is
> to make the axes as big as possible.
>
> I’m working on a PR to make colorbars automatically match the height of
> the shown axes, rather than its place holder, but thats non-trivial.
>
> Cheers,  Jody
>
> On 14 May 2019, at 08:43, Slavin, Jonathan <jslavin at cfa.harvard.edu>
> wrote:
>
> Hi,
>
> I've been working on producing a figure using results of a hydro
> simulation at multiple times. Because the scale of the region of interest
> changes over time, I want the size of the axes to change. My goal is to
> make a figure with results of four timesteps, so four images in a row, with
> each scaled appropriately and with a colorbar on the right. I tried to use
> ImageGrid, but that doesn't like having different axis scales for the plots
> - at least it seems to always scale the y axis the same despite my best
> efforts - though it does a nice job of locating the colorbar.
>
> So I went back to subplots, but in that case the colorbar isn't the right
> size, at least without tweaking the shrink parameter. Also, for some reason
> there is a lot of space on the right of the plot even when I use
> subplots_adjust to set right=0.99. There are many ways to place colorbars,
> I know, but it would seem that my case would not be so unusual that I
> should need such complex methods to do what I want. Maybe I'm missing
> something. Any advice would be appreciated.
>
> Regards,
> Jon
>
> --
> Jonathan D. Slavin
> Astrophysicist - High Energy Astrophysics Division
> Center for Astrophysics | Harvard & Smithsonian
> Office: (617) 496-7981 | Cell: (781) 363-0035
> 60 Garden Street | MS 83 | Cambridge, MA 02138
>
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>
>
> --
> Jody Klymak
> http://web.uvic.ca/~jklymak/
>
>
>
>
>
>

-- 
Jonathan D. Slavin
Astrophysicist - High Energy Astrophysics Division
Center for Astrophysics | Harvard & Smithsonian
Office: (617) 496-7981 | Cell: (781) 363-0035
60 Garden Street | MS 83 | Cambridge, MA 02138
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