MATLAB Answers

Highlight cells in heatmap

19 views (last 30 days)
I created a heatmap where each cell represents a temperature value using the commands:
cdata = [values of temperature]
xvalues = [0,1,2,3,etc.]
yvalues = [0,1,2,3,etc.]
h = heatmap(xvalues,yvalues,cdata)
I need to:
  • command to highlight cells over a limit (for example 500)
  • Highlight cells within a given range (for example 300 to 800)
It is not important how the cells are highlighted, it can be a different colour (like green or blue), or a cross X on top of the cells.
Thanks for the help

Accepted Answer

Rishik Ramena
Rishik Ramena on 1 Dec 2020
You can do so by creating a custom colormap. The code below shows a simple implementation.
xvalues = 1:5;
yvalues = 1:5;
cdata = randi(20,[5,5]); % range of values in cells < 20
cmap = [repmat([1 0 0],5,1)
repmat([1 1 1],5,1) % highlight all cells with values from 5-10 with white
repmat([0 0 0],10,1)]; % highlight all cells > 10 with black
heatmap(1:5,1:5,randi(20,[5 5]),'Colormap',cmap);
  3 Comments
Ilyass Boukhari
Ilyass Boukhari on 1 Dec 2020
All clear! Thank you for your help!

Sign in to comment.

More Answers (0)

Tags

Products


Release

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by