Peter Melchior wrote:
> Hello everybody,
>
> First I have to say, how much I appreciate using matplotlib.
>
> But there are some annoyances. One I stumbled over recently is that histograms
> don't deal with masked arrays properly.
Fixed now in svn.
If you don't want to install from svn, use
hist(data_masked.compressed(), bins)
Eric
>
> For example:
>
> from numpy import *
> from pylab import *
>
> bins = arange(21)
> data_masked = ma.masked_values(bins,10)
> hist(data_masked,bins)
> show()
>
> This example produces (with maplotlib-0.90.0, numpy-1.0) this message:
> /usr/lib/python2.4/site-packages/numpy/core/ma.py:604: UserWarning: Cannot
> automatically convert masked array to numeric because data
> is masked in one or more locations.
> warnings.warn("Cannot automatically convert masked array to "\
>
> But it shows a histogram with one count per bin although data_masked[10]
> should
> not be counted.
>
> When I'm trying "plot(bins,data_masked)", data_masked[10] is left out as
> expected.
>
> Am I missing something or are histograms not (yet) suited for handling masked
> arrays?
>
> Best regards,
>
> Peter Melchior
>
>
>
> -
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