Take a look at the examples/pylab_examples/demo_agg_filter.py Attached is a simple example that shows a line with gradient. However, the current image filter does not know about the data coordinate of the input image. Therefore, if you want to have your gradient stops at certain data values, you need to specify this in some manual way when you create the filter.
Maybe the second approach that I mentioned might be more reasonable. Regards, -JJ On Sun, Sep 27, 2009 at 2:25 AM, Gökhan Sever <gokhanse...@gmail.com> wrote: > > > On Sat, Sep 26, 2009 at 10:16 PM, Jae-Joon Lee <lee.j.j...@gmail.com> wrote: >> >> The gradient, in general, is not supported by matplotlib yet. >> If you're only interested in raster format outputs (like png), I >> think you can use agg_filter functionality (but you need svn version >> of mpl). > > Could you give me a pointer on this where to look for the agg_filter, since > the search option doesn't yield any helpful results. > > I use the svn compiled matplotlib and docs. > > Thanks. > > >> >> Other wise, I guess your best bet is to divide you line into many >> segments and color them differently. >> >> -JJ >> >> >> On Sat, Sep 26, 2009 at 10:27 PM, Gökhan Sever <gokhanse...@gmail.com> >> wrote: >> > Hello, >> > >> > Is it possible use a gradient color say from blue to red and/or >> > specifying >> > certain color threshold for a line plot (i.e I have air temperature >> > plotted >> > and I want to segment the color of the plot for temp > 0C red, and below >> > 0 >> > make it blue.) Would be much nicer with gradient however I am content >> > for >> > the second option as well :) >> > >> > Thanks. >> > >> > -- >> > Gökhan >> > >> > >> > ------------------------------------------------------------------------------ >> > Come build with us! The BlackBerry® Developer Conference in SF, CA >> > is the only developer event you need to attend this year. Jumpstart your >> > developing skills, take BlackBerry mobile applications to market and >> > stay >> > ahead of the curve. Join us from November 9-12, 2009. Register >> > now! >> > http://p.sf.net/sfu/devconf >> > _______________________________________________ >> > Matplotlib-users mailing list >> > Matplotlib-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > >> > > > > > -- > Gökhan >
<<attachment: gradient_line.png>>
demo_agg_filter2.py
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