MATLAB: About contour and transparent

contour

Hi,

     I am trying to plot coutour overlaying on the top of imagesc. But my result is contour blocking the imagesc. I tried to make countour transparency.
     So, please show me how to make countour transparency.
     Thanks.

Best Answer

thick = 0.8;   %alpha value
ch = contourf(...);
patches = findobj(ch,'-property','AlphaData')
for ph = patches
 set(ph,'AlphaData', thick * get(ph,'AlphaData'));
end

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MATLAB: Colormap for relative 2d histogram

How about if you plotted the two histograms on the same axis, with different translucent colors? The place where they were the same would be dark because it would have both colors, the one that was greater would extend further up in its own color.

thick = 0.75;  %alpha
bh1 = bar(histogram1);
hold on
bh2 = bar(histogram2);
patches = findobj([bh1, bh2],'-property','AlphaData')
for ph = patches
 set(ph,'AlphaData', thick * get(ph,'AlphaData'));
end

MATLAB: How to change the location of the contours produced by MESHC or SURFC in HG1

To modify the location of the the contours in the plot you need to modify the ZData property. Each contour line is actually an individual patch object. The level at which these contours are drawn is stored in the ZData property of the patch object. Here is a small example:

% Create a sample plot
meshc(peaks)
% Define the new level at which the contours should
% be drawn
new_level = 5;
% Get the handle to each patch object
h = findobj('type','patch');
% Create a loop to change the height of each contour
zd = get(h,'ZData');
for i = 1:length(zd)
   set(h(i),'ZData',new_level*ones(length(zd{i}),1))
end

For further information on the ZData property of patches please see the MATLAB HelpDesk.

Best Answer

Related Solutions

MATLAB: Colormap for relative 2d histogram

MATLAB: How to change the location of the contours produced by MESHC or SURFC in HG1

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