slice: plot complete slices

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Christoph 2017-8-16

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https://ww2.mathworks.cn/matlabcentral/answers/352976-slice-plot-complete-slices

评论： Christoph 2017-8-16

Hi there! I want to use the slice function to plot slices of a volume:

testVol = cat(3,magic(5),magic(5)+3,magic(5)+6);
figure; slice(testVol,[],[],1:3)

Now the result isn't 3 planes of 5 x 5, but instead 3 planes of 4 x 4:

I have tried specifying the coordinates for X, Y and Z like so:

[X,Y,Z] = meshgrid(1:5,1:5,1:3);
figure; slice(X,Y,Z,testVol,[],[],1:3)

But it seems I am not understanding what these coordinates mean. I thought they'd sample the volume at the requested points, but obviously that is not what is happening.

Any help would be much appreciated!

EDIT: I found that this is a problem of surface. So plotting a 2x2 matrix using surface like so:

surface([1 2; 1 2],[1 1; 2 2],[1 1; 1 1],[1 2; 3 1000])

... only gives you back a 1x1 tile, which is entry (1,1), so the top left one (1 in this case). Would still be very happy if someone could show me how to view a 2x2 matrix in surface as a 2x2 matrix!

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Christoph 2017-8-16

Ok, I found a dirty fix: Simply padding the volume with NaNs or whatever you feel like putting there in an extra column and extra row (end+1) does the job.

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