How I obtain with function bar3 different sizes for each bar in MATLAB?

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Hi all,
I'm writing to inquire about the doubt that I have written for the title of the question:
%----------------------------
values = [1.0 0.6 0.1; 0.0 1.0 0.3; 0.9 0.4 1.0];
h = bar3(values);
shading interp
for i = 1:length(h)
% Get the ZData matrix of the current group
zdata = get(h(i),'Zdata');
set(h(i),'Cdata',zdata)
end
set(h,'EdgeColor','k')
view(-61, 68);
colormap cool
colorbar
%----------------------------
I want to obtain different sizes for each bar that the sizes are function of variable "values". My aim is also to vary the size of each bar according to the Z value, which is between 0 and 1. When I say "size" I mean the X and Y dimensions of the square, the area of the bar in a top view
As shown in this example, I found a similar picture in http://www.sdtools.com/help/ii_mac.html
Thank you very much, José Manuel

Accepted Answer

Jan Orwat
Jan Orwat on 18 Jun 2014
Hello José,
I hope I've understood you correctly. Do you want bars to be cubes which edges are given by array 'values'? If so, I think it is possible to manipulate XData and YData of the bars. Check out this code below (I've edited yours). With a few changes to it, I think you will get what you want.
values = [1.0 0.6 0.1; 0.0 1.0 0.3; 0.9 0.4 1.0];
h = bar3(values);
shading interp
for i = 1:length(h)
% Get the ZData matrix of the current group
zdata = get(h(i),'Zdata');
set(h(i),'Cdata',zdata);
% Get the YData and the XData to manipulate it
xdata = get(h(i),'XData');
ydata = get(h(i),'YData');
xmat = [nan -1 1 nan;
-1 -1 1 1;
-1 -1 1 1;
nan -1 1 nan;
nan -1 1 nan;
nan nan nan nan];
ymat = [nan -1 -1 nan;
-1 -1 -1 -1;
1 1 1 1;
nan 1 1 nan;
nan -1 -1 nan;
nan nan nan nan];
% Create new YData and new XData
% manipulate width of bar3 columns
xdata=xdata-.5*kron(1-values(:,i),xmat);
ydata=ydata-.5*kron(1-values(:,i),ymat);
set(h(i),'XData',xdata,'YData',ydata);
end
set(h,'EdgeColor','k')
view(-61, 68);
colormap cool
colorbar

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