MATLAB: Label the color bar for a heat map created with heatmap(x,y,data)

colorbarlabel;

How can I label the color bar (e.g. 'Pressure (Pa)' or 'Temperature (K)') for a heat map created with h = heatmap(x,y,data)? I don't see a colorbar handle or property in h.

Best Answer

dat = rand(5);
heatmap(dat)
annotation('textarrow',[1,1],[0.5,0.5],'string','My Text', ...
      'HeadStyle','none','LineStyle','none','HorizontalAlignment','center','TextRotation',90);

Related Solutions

MATLAB: How to remove colorbar and heatmap black borders

If you want to remove the colorbar, you can set the ColorbarVisible property to 'off':

h = heatmap(magic(5));
h.ColorbarVisible = 'off';

Alternatively, use the colorbar command:

heatmap(magic(5))
colorbar off

Heatmap does not provide any control over the borders around each cell, so if you want to remove the borders, you will have to switch to a lower-level function like image or surface.

MATLAB: Axis ticks and colorbar labels in bold (heatmap)

Another case where TMW is too clever by far in creating an opaque graphics object -- you have to use the hidden properties to find the underlying pieces.

hAx=h.NodeChildren(3);          % return the heatmap underlying axes handle
hAx.FontWeight='bold';
hCB=h.NodeChildren(2);          % the wanted colorbar handle
hCB.FontWeight='bold';

You can further explore the handles in the NodeChildren array at your leisure.

And, add your voice to the complaints to TMW about their being hidden properties and this propensity to do such nasty things to their users causing them to waste precious billable hours on trivia. If I were still consulting actively, I'd raise holy cain with them. As is, I complain here every chance I get for what good it may do and have communicated my distaste for the policy directly.

Best Answer

Related Solutions

MATLAB: How to remove colorbar and heatmap black borders

MATLAB: Axis ticks and colorbar labels in bold (heatmap)

Related Question