Re: [Matplotlib-users] (no subject)

[Darren D. <dd...@co...>]

On Monday 17 September 2007 01:12:46 pm David Montgomery wrote:
> I am trying to save a sample graph I created as a jpeg image.  It seems
> form the documentation that the type of image can be determined by the
> extension that is used.  Commands seem simple enough.
>
> ind = arange(len(importance_IncNodePurity)) # the x locations for the
> groups width = 0.35 # the width of the bars
> p1 = bar(ind, importance_IncNodePurity, width, color='r')
> ylabel('Importance')
> title('Importance Node Purity')
> xticks(ind+width, importance_row_names)
> psave="c:\eclipse\dafaf.jpg"
> savefig(psave)
> show()
>
>
> However, I seem to get the following errors and I have no idea what they
> mean.
[...]
> File "C:\Python25\Lib\site-packages\matplotlib\backends\backend_agg.py",
> line 493, in print_figure raise IOError('Do not know know to handle
> extension *%s' % ext)
> IOError: Do not know know to handle extension *.jpg

It means the Agg library, which we use for rendering, does not know how to 
create jpegs. Can you work with png's instead? They are a much better format 
for plots and line art than jpegs.

Darren