8000 [NF] Add 'truncate' and 'join' methods to colormaps. by lkilcher · Pull Request #7716 · matplotlib/matplotlib · GitHub
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[NF] Add 'truncate' and 'join' methods to colormaps. #7716

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[NF] Add 'truncate' and 'join' methods to colormaps. #7716

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ea42661
NF - Add 'truncate' and 'join' methods to colormaps.
lkilcher Dec 31, 2016
e15203a
Some pep8 fixes.
lkilcher Dec 31, 2016
42bdcb0
Update .join docstring to include the parameter.
lkilcher Dec 31, 2016
60ebf94
Move methods to `Colorbar`.
lkilcher Jan 1, 2017
f06bf46
Add the __add__ method, and doc.
lkilcher Jan 1, 2017
81ddd1c
Add a `name` parameter to `truncate`
lkilcher Jan 1, 2017
71742d7
Refactor onto a 'join_colormaps' function
lkilcher Jan 1, 2017
fa9f56a
Some ideas for a colormap __getitem__ method.
lkilcher Jan 1, 2017
aba18e0
Fix some floating-point arithmetic issues for low-N.
lkilcher Jan 18, 2017
652b4cf
Simplify getitem.
lkilcher Feb 1, 2017
c2bd712
Add more tests.
lkilcher Feb 1, 2017
6f0a342
pep8
lkilcher Feb 2, 2017
9de0239
Add whats_new and update docstring
lkilcher Sep 27, 2017
48172c7
Compare cmap values in tests (not image comparisons)
lkilcher May 18, 2018
8592695
pep8 fixes
lkilcher May 18, 2018
17e576e
Increase coverage.
lkilcher May 19, 2018
9caba24
Test: 100% coverage!
lkilcher May 20, 2018
2384d0b
Merge branch 'master' into colormap_utils
lkilcher Aug 13, 2018
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Add the __add__ method, and doc.
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@lkilcher
lkilcher committed May 17, 2018
commit f06bf467ccc275903dfcaac92ebf52a0e46c74e7
7 changes: 7 additions & 0 deletions lib/matplotlib/colors.py
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Expand Up @@ -650,6 +650,11 @@ def join(self, other, name=None, frac_self=None, N=None):
# Note that `joined_cmap` will be 2/3 `cmap1`, and 1/3 `cmap2`
# because of the default behavior of frac_self
# (i.e. proportional to N of each cmap).

# This is also available as :meth:`Colormap.__add__`, so that
# the following is possible:

joined_cmap = cmap1 + cmap2
"""
if N is None:
N = self.N + other.N
Expand All @@ -664,6 +669,8 @@ def join(self, other, name=None, frac_self=None, N=None):
# N is set by len of the vstack'd array:
return ListedColormap(np.vstack((map0, map1)), name, )

__add__ = join

def truncate(self, minval=0.0, maxval=1.0, N=None):
"""
Truncate a colormap.
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