Plotting a column of a matrix as function of the others

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Diego Soler Polo
Diego Soler Polo 2018-6-4
评论： Diego Soler Polo 2018-6-4
As the result of a computation, I have a Nx3 matrix (N is huge). The first column is called X, the second column is called Y and the third column is called Z. I want to plot Z as a function of X and Y, but there's no any particular order in the rows of the matrix and there might be repetitions. I would like to do two things:
1) Plot Z thridimensionally, as in a surface plot
2) Make a color map
How can I do this?
Thanks

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回答（1 个）

monika shivhare
monika shivhare 2018-6-4
make a meshgrid using values of X and Y
[x,y] = meshgrid(X,Y);
make a surfaceplot
surf(x,y,Z)
refer to link surface plots
to make a colormap to the surfaceplot refer Change Color Scheme Using a Colormap
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Diego Soler Polo
Diego Soler Polo 2018-6-4
X and Y are so large (they have about 7 million components each) that this doesn't work (MATLAB cannot create the grid). Is there any other way around this?

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