MATLAB: Choosing color of bars in bar graph depending on value (not individual, but from colormap)

barcdatacolorMATLABplot

Hello
I want to create a 2D- bar graph and Color the bars depending on their values in gray tones. That is what I have so far:
figure()
y = rand(10,1)*3-1.5;
x = linspace(start, end, size(y));
b=bar(x,y,1);
% Defining Colormap
cm=gray(size(y));
colormap(cm);
set(get(b,'children'),'cdata', y);
But this does not work. Neither:
set(get(b,'children'),'CData', y);
I am missing something. Any help?
MJ

Best Answer

Okay. I have found a complicated way of doing it:
figure()
hold on
y= vector;
x = linspace(startpoint, endpoint, size(y,2));
barColorMap= gray(size(y,2));
lscale=linspace(min(y),max(y),size(barColorMap,1));
for cnt=1:size(y,2)
    bg=bar(x(cnt),y(cnt),1);
    [~,ind]=min(abs(lscale(:)-y(cnt)));
    set(bg,'FaceColor',barColorMap(ind,:),'EdgeColor',barColorMap(ind,:));
end
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