Heatmap - how to get the plotted colors

16 views (last 30 days)
Nils Liebe
Nils Liebe on 3 Sep 2021
Commented: Nils Liebe on 5 Sep 2021
Dear all,
I would like to get the rgb-color code of a data set i am plotting in a heatmap. Does anyone know where they are stored or how to extract them?
%Exp.
Data=[0.216745778875956
0.0122005059399983
0.0162673412533310
0.00149830774701733
0.263389055948955
0.342338724357287
0.0955767041221151
0.119981642250681
0.0606266369191968
0.759691756727176
0.514382973045806
0.668104140446562
0.720311719592812
0.671178482390491
0.278785037951106
0.476509405546337
0.409639773389851
0.582438199698988
0.567789956119946
0.281777114781149
0.674368366676059
0.188936792339474
0.746659486291274
0.827451886871509
0.708089195819381
0.345204905187858
0.492727562626227
0.453467008650955];
fig=heatmap(Data,'Colormap',jet);

Answers (2)

J Chen
J Chen on 3 Sep 2021
camp = colormap
https://www.mathworks.com/help/matlab/ref/colormap.html
  1 Comment
Nils Liebe
Nils Liebe on 5 Sep 2021
Edited: Nils Liebe on 5 Sep 2021
Thanks for your answer.
I already tried colormap(); The problem is that you get all 256 values auf the jet-colormap. I only want the rgb-values of my 28 data points (or the position within the colormap). :(

Sign in to comment.


darova
darova on 5 Sep 2021
Just scale values
%Exp.
Data=[0.216745778875956
0.0122005059399983
0.0162673412533310
0.00149830774701733
0.263389055948955
0.342338724357287
0.0955767041221151
0.119981642250681
0.0606266369191968
0.759691756727176
0.514382973045806
0.668104140446562
0.720311719592812
0.671178482390491
0.278785037951106
0.476509405546337
0.409639773389851
0.582438199698988
0.567789956119946
0.281777114781149
0.674368366676059
0.188936792339474
0.746659486291274
0.827451886871509
0.708089195819381
0.345204905187858
0.492727562626227
0.453467008650955];
n = 100; % number of colors
ind = round(Data*n)+1; % indices of colors (scale)
cm = jet(n); % create colormap
cm(ind,:) % show colors RGB
ans = 28×3
0 0.4000 1.0000 0 0 0.5600 0 0 0.6000 0 0 0.5200 0 0.5600 1.0000 0 0.8800 1.0000 0 0 0.9200 0 0 1.0000 0 0 0.7600 1.0000 0.4400 0
  1 Comment
Nils Liebe
Nils Liebe on 5 Sep 2021
Exactly what I needed.
Thanks a lot :)

Sign in to comment.

Categories

Find more on Data Distribution Plots in Help Center and File Exchange

Tags

Products


Release

R2021a

Community Treasure Hunt

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

Start Hunting!