Hi all,
I am trying to produce a weighted histogram.
The help text for "hist" here:
http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.hist
has a mention of adding weights, but it is not noted in the command line
section where this should appear.
Calling:
hist(data,20,data_weights)
gives the error:
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/matplotlib/pyplot.py",
line 1868, in hist
ret = gca().hist(*args, **kwargs)
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/matplotlib/axes.py",
line 6236, in hist
normed=bool(normed), new=True)
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/numpy/lib/function_base.py",
line 353, in histogram
mn, mx = range
ValueError: too many values to unpack
Calling:
hist(data,20,weights=data_weights)
gives the error:
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/matplotlib/pyplot.py",
line 1868, in hist
ret = gca().hist(*args, **kwargs)
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/matplotlib/axes.py",
line 6371, in hist
p.update(kwargs)
File
"/usr/local/python-2.5.2/lib/python2.5/site-packages/matplotlib/artist.py",
line 453, in update
raise AttributeError('Unknown property %s'%k)
AttributeError: Unknown property weights
There's no indication in the help text of where or how to insert the
weights array.
Thanks in advance,
Michael
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