Fix scatter norm keyword #45966
Fix scatter norm keyword #45966
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small comment & if you can merge master; ping on green |
| ax = df.plot.scatter(x="a", y="b", c="c") | ||
| color_min_max = (df.c.min(), df.c.max()) | ||
| default_norm = mpl.colors.Normalize(*color_min_max) | ||
| assert all(df.c.apply(lambda x: ax.collections[0].norm(x) == default_norm(x))) |
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Could this be done without apply? It will be easier to debug if this assertion doesn't go through necessary code paths.
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What's the better approach? Just a loop?
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Yeah the old check you had prior was good. The data doesn't have to be random as well if that helps shorten your loop and allows looping over less values
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Ok, I'll revert to the previous check. I think looping over the values in the dataframe makes sense; it's replicating what's going on in the actual plot, and there's no real benefit to including values that are out of bounds - that's matplotlib normalize functionality.
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Great PR @Andy-Grigg, thanks. |
| @@ -421,7 +421,7 @@ Plotting | |||
| - Bug in :meth:`DataFrame.plot.box` that prevented labeling the x-axis (:issue:`45463`) | |||
| - Bug in :meth:`DataFrame.boxplot` that prevented passing in ``xlabel`` and ``ylabel`` (:issue:`45463`) | |||
| - Bug in :meth:`DataFrame.boxplot` that prevented specifying ``vert=False`` (:issue:`36918`) | |||
| - | |||
| - Bug in :meth:`DataFrame.scatter` that prevented specifying ``norm`` (:issue:`45809`) | |||
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I see this PR has now been merged, but I think this is supposed to be `DataFrame.plot.scatter`. Are the changelogs worth fixing?
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sure can do another PR to update |
* TST: add test for norm scatter plot parameter (pandas-dev#45809) * BUG: don't duplicate norm parameter for scatter plots (pandas-dev#45809) * TST: Add github issue numbers (GH45809) * TST: remove dependence on private attributes (pandas-dev#45809) * DOC: add entry to visualization bug fixes (pandas-dev#45809) * TST: reduce number of norm comparisons (pandas-dev#45809) * TST: simplify test (pandas-dev#45809)
normkeyword fails with 'multiple values for keyword argument' TypeError #45809doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.This PR addresses a bug where the
normparameter is used for a scatter plot where theccolor is a non-categorical type (e.g. a numeric type). This combination of inputs would result in thenormparameter being specified both as an explicit keyword argument and inself.kwds.The behavior has changed such that
normis only ever specified once, and in the scenario described above the value specified by the user will be honored.I tried to test that the specific
normvalue ended up in the plot, but there doesn't seem to be a good way of comparingnorm._scaleobjects without comparing the individual attributes. I'm happy to add this in if required.