Re: [Matplotlib-users] Color Bar in Contour Plot

Lorenzo,

1) What version of mpl are you using?

2) Please generate a short, simple stand-alone script that illustrates 
the problem.  Use some minimal amount of fake data, preferably generated 
by a function rather than read from a table.

Eric

Lorenzo Isella wrote:
> Dear All,
> Some weeks ago I emailed the list asking how to represent data on a 
> non-rectangular domain (namely a velocity component along a tube 
> cross-section in my case).
> I now can tell that everything goes as in the example described by 
> Hansen in Matplotlib-users Digest, Vol 14, Issue 13, which dealt about 
> plotting a contour of gridded data.
> However, when I try the following (rsin_t and rcos_t contain the 
> position of a point on a circle, namely
> (r*cos(t), r*sin(t)) ):
> 
> import pylab
> #.... do my stuff here to load the data and manipulate the coordinates
> 
> #pylab.colorbar()
> pylab.clf()
> pylab.contourf(rsin_t.transpose(), rcos_t.transpose(), 
> vel_section.transpose(),arange(min(ravel(vel_section)),(max(ravel(vel_section))+0.01),0.01),interpolation="bilinear",cmap=pylab.cm.jet)
> pylab.colorbar()
> 
> #pylab.show()
> 
> pylab.savefig("velocity_on_section.png")
> pylab.hold(False)
> 
> Everything is almost fine if it was not for the following two problems:
> (1)the colorbar contains shows colors ranging from 0 to 1, whereas the 
> represented scalar for the contour plot goes from 0 to 0.76.
> (2)centered below the colorbar (not at its left-hand side, where there 
> is a 0), there is a number with many digits which cannot be even 
> properly read; I do not know where it comes from, but I would like to 
> get rid of it.
> 
> Overall, pylab is doing everything I want, just I would like to iron out 
> these last glitches, probably due to something I am doing wrong.
> Many thanks for any suggestion here.
> 
> Lorenzo
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a browser.
> Download your FREE copy of Splunk now >>  http://get.splunk.com/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users