Add contour to 3d surface plot

2011 10 6
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I have a 3d surface plot created using surf(x,y,z,c) and I would like to highlight a certain area by either drawing a contour line where each x,y,z triple exceeds a level, or by using a differnet colour in this an (or both)!
The help on contourslice is a bit obscure for me
Thanks

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回答（1 个）

Wayne King
Wayne King 2011-10-6

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Do you want a contour, or a patch()?
[X,Y,Z] = peaks;
surf(X,Y,Z); hold on;
patch(X,Y,4*ones(size(Z)),'green');
view(-20,4);

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Wayne King
Wayne King 2011-10-6
sorry pasted incorrectly at first.
Julie
Julie 2011-10-7
That didn't seem to work at all...
I have being playing wiith subvolume :
[a,b,c,V]=subvolume(X,Y,Z,V,[mx-3,mx,my-3,my,mz-3,mz])
but I get the error 'V must be a 3D array' - which isn't very helpful since I think v is a 3d array, (X, Y,Z = are all 30x30 matrces)
Any thoughts?
Sean de Wolski
Sean de Wolski 2011-10-7
30x30 is 2d...
30x30x30 would be 3d.
Sean de Wolski
Sean de Wolski 2011-10-7
You visualize a dimension for each component. x/y can be 1d vectors and you visualize them on a 2d x/y plot. x/y/z are 2d matrices and so you visualize them on a 3d plot.

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Julie
Julie
2011-10-6

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