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FIX: image respect norm limits w/ None #11047

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Merged
tacaswell merged 3 commits into from
May 14, 2018
Merged

FIX: image respect norm limits w/ None #11047

tacaswell merged 3 commits into from
May 14, 2018

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@jklymak
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@jklymak jklymak commented Apr 13, 2018 •
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PR Summary

Re-closes #10072

We are slowly suqishing the "big number" bugs in imshow.

This one was caused by only specifying vmax but not vmin. Algorithm is the same as before, but if vmin is None, then we scale by a_min.

import matplotlib.pyplot as plt
import numpy as np

x=np.random.random([3,3])
x[1,1]=1.e80
plt.imshow(x,vmax=2)

plt.show()

Before

figure_1

After

figur

PR Checklist

  • Has Pytest style unit tests
  • Code is PEP 8 compliant
  • New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

@jklymak jklymak added this to the v2.2.3 milestone Apr 13, 2018
@jklymak jklymak requested a review from tacaswell April 13, 2018 16:50
@jklymak jklymak mentioned this pull request Apr 13, 2018
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tacaswell
tacaswell reviewed Apr 13, 2018
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lib/matplotlib/image.py Outdated
a_max = np.float64(newmax)
if newmax is not None or newmin is not None:
A_scaled = np.clip(A_scaled, newmin, newmax)
vmin = self.norm.vmin if self.norm.vmin is not None else a_min
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I would do if self.norm.vmin is None or self.norm.vmax is None: self.norm.autoscale_None(A)

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@jklymak jklymak Apr 13, 2018

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Sure - its OK to modify the norm here?

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@jklymak jklymak Apr 13, 2018

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don't even need the if-statement in that case.

@jklymak jklymak force-pushed the fix-image-respect-norm-limits branch from 9d17f6f to 023ddb8 Compare April 13, 2018 19:53
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jklymak commented Apr 18, 2018

Ping @tacaswell

timhoffm
timhoffm approved these changes May 5, 2018
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Please squash before merging.

@jklymak jklymak force-pushed the fix-image-respect-norm-limits branch from 023ddb8 to 918c8a5 Compare May 6, 2018 15:28
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jklymak commented May 6, 2018

squashed and rebased....

@jklymak jklymak closed this May 6, 2018
@jklymak jklymak reopened this May 6, 2018
@jklymak jklymak requested a review from tacaswell May 7, 2018 21:45
@jklymak jklymak force-pushed the fix-image-respect-norm-limits branch from 918c8a5 to 8d53a8a Compare May 9, 2018 20:32
@tacaswell tacaswell merged commit 59e550b into matplotlib:master May 14, 2018
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lumberbot-app bot commented May 14, 2018

There seem to be a conflict, please backport manually

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dstansby commented May 29, 2018

Does this want a backport to 2.2.x?

tacaswell added a commit to tacaswell/matplotlib that referenced this pull request Aug 4, 2018
@tacaswell
Merge pull request matplotlib#11047 from jklymak/fix-image-respect-no…
faf9684 
…rm-limits

FIX: image respect norm limits w/ None
Conflicts:
	lib/matplotlib/image.py
          - keep changes backported from master.  Looks like conflict
            was due to some white-space clean up done on master.
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tacaswell commented Aug 5, 2018

backported to v2.2.x as faf9684

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@timhoffm timhoffm timhoffm approved these changes

@tacaswell tacaswell Awaiting requested review from tacaswell

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v2.2.3

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Successfully merging this pull request may close these issues.

imshow doesn't properly display some images

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@jklymak @dstansby @tacaswell @timhoffm