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

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 :)

[Rik]

It is probably easier to use patch in a loop in this case. Can you give an example of your intended result?

[Adam]

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]

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:

but I want the color range to be specified by me.

Answer 1

[Adam Danz]

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

[Adam Danz]

Ana Bianco's answer moved here as a comment

Perfect! That worked! Thank you!

[Adam Danz]

Glad I could help!