How can I define the colors of the bar, depending on their Z value?

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Ana Bianco
Ana Bianco 2019-9-23
评论： Adam Danz 2019-9-24
Hello all,
I have this matrix (8x8) with z values between 0 and 1.
For each 0.1, I want the bar to be varying from the lightest to the darkest color.
Hor can I do this?
I did a bar3 for the matrix.
Thanks in advance :)
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Adam
Adam 2019-9-23
Do you want literally the same colourmap repeated 10 times or are you expecting it to also get darker as you move up from 0 to 1? If the former then just create your colourmap and use e.g.
myNewcolourmap = repmat( myColourmap, [10, 1] );
to create one that varies within each 10th of the range. Of course if you want to start compressing the colour range to less than 0-1 or use it on arbitrary ranges it may not do what you want, but for a fixed 0-1 range it should work fine.
Ana Bianco
Ana Bianco 2019-9-23
For example, with this comand :
b = bar3(FINALVALUESMAC);
for k = 1:length (b)
zdata = b(k).ZData;
b(k).CData = zdata;
b(k).FaceColor = 'interp';
end
I got this figure: snapshot1.png
but I want the color range to be specified by me.

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Adam Danz
Adam Danz 2019-9-23
编辑：Adam Danz 2019-9-23
After the section of code in your comment above, you can change the colormap to one of Matlab's built-in colormaps or you can create your own. Then use caxis() to scale the color range if needed.
colormap('hot')
% or can flip the colormap
colormap(flipud(colormap('hot')))
% If needed, scale color range
caxis([0,1]) % or whatever range you want

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