colormap doesn't work with bar plots in 2019a

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Clay Fulcher
Clay Fulcher 2020-3-27
编辑： Clay Fulcher 2025-4-30
I have been changing the colormap in bar charts for decades. It doesn't seem to work now with bar charts in 2019a.
Previously all I had to do to change the colormap in an existing bar chart to copper: colormap copper
Now it does nothing.

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采纳的回答

Cris LaPierre
Cris LaPierre 2020-3-27
Not sure if it's changed, but here's an example borrowed from the doc on bar.
y = [1 3 5; 3 2 7; 3 4 2];
b = bar(y,'FaceColor',"flat");
for k = 1:size(y,2)
b(k).CData = k;
end
If I want to use a different colormap, I could do this.
colormap copper
y = [1 3 5; 3 2 7; 3 4 2];
b = bar(y,'FaceColor',"flat");
for k = 1:size(y,2)
b(k).CData = k;
end
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KV
KV 2024-2-9
I discovered this issue too today, working through some legacy code! This solution breaks a lot of older code that was used to produce plots.
Kind of silly and quite a pity now that it'll take a for loop with each bar command to change facecolors....
Clay Fulcher
Clay Fulcher 2025-4-30
编辑：Clay Fulcher 2025-4-30
Cris and KV,
This issue became so annoying that I finally wrote a function to quickly change the colormap of a bar graph. Here it is.
function barcolormap(axesobject,cmap)
%
% This function changes the colormap used with bar graphs.
% USAGE
% barcolormap(axesobject,cmap)
%
% INPUT
% axesobject - the axes object from an existing plot or subplot. Get this
% from the existing axes with axesobject=gca;
% cmap - string containing the chosen colormap. Pre-defined colormaps are:
% parula
% turbo
% hsv
% hot
% cool
% spring
% summer
% autumn
% winter
% gray
% bone
% copper
% pink
% sky (since R2023a)
% abyss (since R2023b)
% jet
% lines
% colorcube
% prism
% flag
% white
%
% EXAMPLE
% bar(rand(6,3));
% axesobject=gca;
% cmap='copper';
% barcolormap(axesobject,cmap); % Change colormap to copper
% barcolormap(axesobject,'winter'); % Change colormap to winter
%
% USAGE
% barcolormap(axesobject,cmap)
%
h=axesobject;
set(h,'colormap',eval(cmap))
hbar=get(h,'children');
Lbar=length(hbar);
for i=1:Lbar
set(hbar(i),'FaceColor','flat');
hbar(i).CData=i;
end

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