How I can define the group colour in 3D bar plot?

Hi,

I did 3d bar plot:

Z = data(2000:4000,:);              %  data

Y = [1 300  600];   % The positions of bars along the y axis

h = bar3(Y,Z',0.1); 

set(gca, 'YTickLabel', {'s1' 's2' 's3'});

I want s1 (green) s2( red) s3 (blue) (See Figure).

All suggestions are welcomed

Answer 1

[Walter Roberson]

Unfortunately in R2014b and all other released versions (currently R2017a), the only way to control color in bar charts is to call bar once per color you want to use.

[Bruno]

Thanks, how I can control colour in bar charts?

[Walter Roberson]

You can use a LineSpec once per bar3() call, and all bars created in that call will have the (first) color listed there.

Alternately, when you call bar3() you can save the graphics handles that are returned. There will be one surface() object for each column of the Y data. Each surface object in turn has a CData property that you can adjust, but you effectively have to adjust it face-by-face .

[Bruno]

I used the following script, only the first bar are coloured (for each group with different colour), the rest remain similar colour between the group

   h = bar3(Y,Z',0.1); 
  [nBar, nGroup] = size(Z');
  nColors  = size(get(gcf, 'colormap'), 1);
   colorInd = randi(nColors, nBar, nGroup);
   for i = 1:nGroup
   c     = get(h(i), 'CData');
   color = repelem(repmat(colorInd(:, i), 1, 4), 6, 1);
   set(h(i), 'CData', color);
end

[Walter Roberson]

Sorry, I do not know at the moment, and I think it is time for me to head to bed.

[Bruno]

Thanks, for your help