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[MRG+1] Fix imshow masked interpolation#8024
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[MRG+1] Fix imshow masked interpolation#8024
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tacaswell commentedFeb 5, 2017
So, defiantly 🐲 in up-sampling when mixing masking + over/under with in the kernel foot print. importmatplotlib.pyplotaspltimportmatplotlibasmplimportmatplotlib.colorsasmcolorsimportmatplotlib.imageasmimageimportmatplotlib.cmasmcmimportnumpyasnpimportcopycm=copy.copy(mcm.get_cmap('viridis'))cm.set_over('r')cm.set_under('b')cm.set_bad('k')n=mcolors.Normalize(vmin=0,vmax=100)data=np.arange(100,dtype='float').reshape(10,10)data[5,5]=-1data[7,7]=101data[3,3]=np.nandata[5,3]=np.infmask=np.zeros_like(data).astype('bool')mask[3,5]=Truedata=np.ma.masked_array(data,mask)fig,ax_grid=plt.subplots(3,6)forinterp,axinzip(mimage._interpd_,ax_grid.ravel()):ax.set_title(interp)im=ax.imshow(data,norm=n,cmap=cm,interpolation=interp)
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tacaswell commentedFeb 5, 2017
Right, forget about the topo failure, that is due to the resample vs not resample change and I have not looked into it yet. |
8786852 to236b48fComparetacaswell commentedFeb 6, 2017
On the bright side I have managed to fix this without having to change classic style and only update 1 test image, on the down side, one test is still broken. |
tacaswell commentedFeb 6, 2017
and I have fixed the checker-board effect in that png above, that was due to Agg's aggressive clipping. |
236b48f to5e83b93Comparetacaswell commentedFeb 6, 2017
Of course this passes locally... |
a1fbee5 to73091acCompareWhen determining which pixels to mask in the resampled image, if _any_contribution to final value comes from a masked pixel, mask theresult.Due to Agg special-casing the meaning of the alpha channel,the interpolation for the mask channel needs to be done separately.This is probably a template for doing the over/under separately.print out exact hash on travis
73091ac to1a7c4efCompare| install: | ||
| -ccache -s | ||
| -git describe |
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I'm not concerned about this, but would like to make sure that you intended to have this here.
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I did, was a bit worried that gh/travis were having caching / timeout issues and not running the code I thought it was running (turns out the problem is I had accidentally depended on dictionary ordering in 3.6). I think this is a good idea to keep around so that we can verifyexactly what code travis runs for testing locally (it should be running on the merge into the target branch, when it re-sets what that merge is is not something I fully understand yet).
QuLogic commentedFeb 6, 2017
The CI failure appears non-transient. |
dopplershift commentedFeb 6, 2017
What happened to Appveyor? |
QuLogic commentedFeb 6, 2017
It doesn't run on the |
dopplershift commentedFeb 6, 2017
How did I not know that? |
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Looks reasonable to me. Only a minor question.
| # 'unshare' the mask array to | ||
| # needed to suppress numpy warning | ||
| delout_mask | ||
| invalid_mask=~output.mask*~np.isnan(output.data) |
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Would& work here instead of*? Would make more sense given the boolean masks.
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Are there performance rather than semantic advantages? I think~(a & b) would also work and have one less temprorary.
| fig,ax_grid=plt.subplots(3,6) | ||
| forinterp,axinzip(sorted(mimage._interpd_),ax_grid.ravel()): | ||
| ax.set_title(interp) |
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I don't think there's any point adding a title ifremove_text isTrue in the decorator. Otherwise this patch looks good to me.
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The title is there for human debuggers later (I often copy-past tests into another buffer and just run them)
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👍
| forinterp,axinzip(sorted(mimage._interpd_),ax_grid.ravel()): | ||
| ax.set_title(interp) | ||
| ax.imshow(data,norm=n,cmap=cm,interpolation=interp) | ||
| ax.axis('off') |
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Same as above, prseumably pointless withremove_text == True
QuLogic commentedFeb 24, 2017 • edited
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This makes for an ugly change in Cartopy: You might need to view the full resolution image, but it's pretty evident on the lower-most blue one. It used to match the outline, but now there's a very obvious not very straight white bit along the edge. |
dopplershift commentedFeb 25, 2017
sigh |
QuLogic commentedFeb 25, 2017
The build also failed |
QuLogic commentedFeb 25, 2017
Even weirder,#8144 is failling on that test on 3.5 but not other versions, even after a rebuild... |
tacaswell commentedFeb 26, 2017
The rotate image test did give me trouble when working on this. |
tacaswell commentedMar 15, 2017
I have sorted out the reason (but not the cause) of the rotate_image failures, for some reason the |
QuLogic commentedMar 15, 2017 • edited
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Maybe it should use |
tacaswell commentedMar 15, 2017
That would fix it, but we should also fix |
Closes#8012
The code changes are in the first commit, the image changes are in the second.
This probably needs some more tests and docs. I suspect there is at least one more 🐉 down here...
attn@mdboom