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

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

[Adam]

Try

set( b, 'FaceColor', 'flat' )

as described in one of the examples in

doc bar

[MarionJ]

The bars have no individual coloring with this command...

[Walter Roberson]

Please do not use "end" as a variable name; you will confuse us, you will confuse you, you will confuse MATLAB.

[MarionJ]

Sorry. This is actually not my original code. Just edit it for the question. But you are right.

Answer 1

[MarionJ]

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