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Make NaN value part of matrix

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Ham Man
Ham Man 2020-9-24
关闭： MATLAB Answer Bot 2021-8-20
I have a 4d velocity matrix in a circular pipe: x,y,z,t
size are as follows:(number of grid points)
x=60,y=60,z=40,t=80
I want to use just 3 planes in x direction and make the remain as a NaN values.
How can I do that?(make just I want to keep 3 planes in x direction.one at the center of pipe,one on top of that and one bottom)

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Ameer Hamza
Ameer Hamza 2020-9-24
Do something like this
x_planes = [1 30 60]; % x-planes to keep
M = % 60x60x60x80 matrix
M_new = M*nan;
M_new(x_planes, :, :, :) = M(x_planes, :, :, :)

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