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

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MarionJ
MarionJ 2018-6-28
编辑： MarionJ 2018-6-28
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
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Walter Roberson
Walter Roberson 2018-6-28
Please do not use "end" as a variable name; you will confuse us, you will confuse you, you will confuse MATLAB.

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MarionJ
MarionJ 2018-6-28
编辑：MarionJ 2018-6-28
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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