If we assume I have a 1000×2 matrix generated using:
A = randn(1000,2);How can I surface plot that A matrix to achieve a result similar to this image:
MATLAB: How to surface plot a 1000×2 matrix
MATLABmeshgridsurf
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Here is an example
m = 20; % generate some data
n = 500;x = randn(500,1);y = randn(500,1);z = randn(500,1); % create regular grid
x1 = linspace(min(x),max(x),m);y1 = linspace(min(y),max(y),m);[X,Y] = meshgrid(x1,y1); % calculate density matrix
xy = hist3([x y],[m m]);plot3(x,y,z,'.r')surface(X,Y,xy*0-5,'cdata',xy)axis vis3d
The 'YDataSource' property is not available for histogram object and hence it not possible to link it directly with LINKDATA.
To work around this issue, use the BAR function, which can be used to plot a histogram, and specify the 'YDataSource' for a BAR object.
This approach will require:
1. Computing vectors n and xout containing the frequency counts and the bin locations with the following command:
[n,xout] = hist(ydata,xdata) ;2. Using bar(xout,n) to plot the histogram. For more information on using HIST and BAR functions together, please see the HIST function documentation by executing the following in the MATLAB command prompt:
doc histConsider the following example:
x = -4:0.1:4;y = randn(1000,2);[n,xout] = hist(y,x) ;figuresubplot(2,1,1)bar(xout,n(:,1),'YDataSource','n(:,1)')subplot(2,1,2)bar(xout,n(:,2),'YDataSource','n(:,2)')%turn on datalinking
linkdata ony = randn(1000,2);% recalculate n
[n,xout] = hist(y,x) ;
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