MATLAB Answers

Get the facecolor of a contourf plot

56 views (last 30 days)
Giorgos Papakonstantinou
Giorgos Papakonstantinou on 10 Mar 2014
Commented: Johannes Korsawe on 26 Jan 2015
I would like to find the facecolor of the the contourf patches. For example if :
[X,Y,Z] = peaks;
I would like to get the 5 different facecolors of the patches of the contour.
Thank you


Sign in to comment.

Answers (1)

Doug Hull
Doug Hull on 11 Mar 2014
[X,Y,Z] = peaks;
[l, h] = contourf(X,Y,Z,4)
hp = get(h,'children')
This gets you the value of the cdata. Look at the colormap to get the actual RGB color. Look at the colorbar to see what those values correspond to.


Show 2 older comments
Kellen on 12 Jan 2015
Any ideas on how to do this in 2014b, in which the cdata field no longer exists?
Kelly Kearney
Kelly Kearney on 12 Jan 2015
On the plus side, the new version stores the exact color value, so you don't need to use the color interpolation trick. On the down side, the properties are buried under a few layers of undocumented properties, so this may change down the road:
[X,Y,Z] = peaks;
[l, h] = contourf(X,Y,Z,4);
rgba = double(cat(2, h.FacePrims.ColorData))./255;
col = rgba(1:3,:)';
Johannes Korsawe
Johannes Korsawe on 26 Jan 2015
Kelly, is there some undocumented chance for some magic to set some FaceAlpha-Values for the plotted areas of the contourf-command?

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by