creating a hist3() plot with already binned data

Hello,

I was wondering if anybody could help me with a relatively simple problem that I have creating a plot. I create a 3D histogram using the code below. It bins the data accordingly and then creates the plot.

My question, if I have the data already binned in a 81x121 matrix, what would the code be to create the plot. I need to skip the hist3() part in a way.

I would be grateful if anybody could advise me how to do so.

Thank you

Regards

J

edges = {-4:0.1:4, 0:120}
hist3(Data,'Edges',edges);
set(gcf,'renderer','opengl');
s = get(gca,'child');
zData = get(s,'zData');
colormap hot;
set(s,...
'zData'     ,zData/length(Data),... % normalize frequency
'FaceColor' ,'interp',...
'EdgeColor' ,0.3*[1 1 1],...        % make edges visible at all heights
'CDataMode' ,'auto');               % color tops according to height

Answer 1

[the cyclist]

I think you just need the bar3 command. For example,

>> bar3(magic(5))

This is analogous to using bar() to plot the results of a regular histogram.

[John]

Thanks, I though that would work.

But how would I set the colors on the plot. In the previous method it gets the zdata from the plot and normalizes it. The data is already normalized, I just want to color it in the same way but I'm not sure of the correct syntax.

Thank you

[the cyclist]

A = magic(3);
h = bar3(A);
for ii = 1:length(h)
    ZData = get(h(ii),'ZData');
    set(h(ii), ...
    'CData'     ,ZData/length(A),...
    'FaceColor' ,'interp',...
    'EdgeColor' ,0.3*[1 1 1]);
end

[John]

Thank you

[the cyclist]

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Answer 2

[Yelena Bagdasarova]

On a related note, here's a method to redraw a histogram of binned data using bin edges and counts:

histogram('BinEdges',[1 2 3 4],'BinCounts',[1 2 3],'DisplayStyle', 'stairs')