Hi Everyone,
I am trying the matplotlib. I have to say this is a powerful package for
scientific 2-D plotting. However, I encountered some problems when try
to generate several colormaps.
for example:
a=cm.get_cmap('gist_rainbow',256)(range(256))
will give a error:
Traceback (most recent call last):
File "<pyshell#82>", line 1, in <module>
a=cm.get_cmap('gist_rainbow',256)(range(256))
File "...\site-packages\matplotlib\colors.py", line 498, in __call__
if not self._isinit: self._init()
File "...\site-packages\matplotlib\colors.py", line 649, in _init
self._segmentdata['red'], self._gamma)
TypeError: tuple indices must be integers, not str
but other colormaps can actually work:
a=cm.get_cmap('gist_stern',256)(range(256))
>>> a
array([[ 0. , 0. , 0. , 1. ],
[ 0.0716923 , 0.00392157, 0.00784314, 1. ],
[ 0.14338459, 0.00784314, 0.01568627, 1. ],
...,
[ 0.99215686, 0.99215686, 0.97040326, 1. ],
[ 0.99607843, 0.99607843, 0.98520163, 1. ],
[ 1. , 1. , 1. , 1. ]])
I tried all possible colormaps and found out: gist_rainbow, terrain,
bwr, brg, and seismic will generate the same error, all other colormaps
are OK. I wonder is this a bug or expected behavior?
###############################
##matplotlib verison : '1.0.svn'
>>> maps=[m for m in cm.datad if not m.endswith("_r")]
>>> for i in maps:
try:
a=cm.get_cmap(i,256)(range(256))
except:
(type, value, traceback) = sys.exc_info()
print "Problems to create %s" % (i,)
print "The error was --> %s: %s" % (type, value)
Problems to create gist_rainbow
The error was --> <type 'exceptions.TypeError'>: tuple indices must be
integers, not str
Problems to create terrain
The error was --> <type 'exceptions.TypeError'>: tuple indices must be
integers, not str
Problems to create bwr
The error was --> <type 'exceptions.TypeError'>: tuple indices must be
integers, not str
Problems to create brg
The error was --> <type 'exceptions.TypeError'>: tuple indices must be
integers, not str
Problems to create seismic
The error was --> <type 'exceptions.TypeError'>: tuple indices must be
integers, not str
##################################################################
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