On Mon, Jul 6, 2009 at 5:45 PM, Michael Cohen<mco...@caltech.edu> wrote: > 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.
The weights kwarg is not yet in the official release, only in svn. See http://matplotlib.sourceforge.net/faq/installing_faq.html#install-from-svn The site docs and examples generally track svn, so sometimes you see features that are not out yet. We will try and get a release out soon.... JDH ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
