PR Summary

We often have the situation where we have a grid of fixed-aspect axes, and they end up with too much space in one direction or the other:

For simple cases, it is not hard to fix this, as is done with this PR:

API:

As with previous efforts at doing this the API is a bit klunky, but I think it needs to be optional so we need something.

importmatplotlib.pyplotaspltimportnumpyasnpnrows=2ncols=3forcompressin [False,True]:fig,axs=plt.subplots(nrows,ncols,figsize=(4,4),constrained_layout={'compress':compress},sharex=True,sharey=True)fig.patch.set_facecolor("0.9")#fig.set_constrained_layout_pads(compress=True)foriinrange(nrows):forjinrange(ncols):ax=axs[i,j]ax.set_aspect(1)pc=ax.pcolormesh(np.random.randn(30,30))fig.colorbar(pc,ax=axs)fig.savefig(f'/Users/jklymak/downloads/Compress{compress}.png',dpi=100)

PR Checklist

• Has pytest style unit tests (andpytest passes).
• IsFlake 8 compliant (runflake8 on changed files to check).
• New features are documented, with examples if plot related.
• Documentation is sphinx and numpydoc compliant (the docs shouldbuild without error).
• Conforms to Matplotlib style conventions (installflake8-docstrings and runflake8 --docstring-convention=all).
• New features have an entry indoc/users/next_whats_new/ (follow instructions in README.rst there).
• API changes documented indoc/api/next_api_changes/ (follow instructions in README.rst there).