removing 0 values from an array while maintaining an array

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nnnnnew01
nnnnnew01 2022-3-30
回答： Voss 2022-3-30
i have used data(data == 0) = [] to remove the 0's however it shifts the remaining numbers into columns rather than keeping the array layout? wondering if there is a way to keep it in array format and remove 0 values.

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Voss
Voss 2022-3-30
Ran in:
If you know there are always the same number of zeros in each column, you can reshape after removing them:
% random matrix with one zero in each column:
M = rand(7,3);
M([7 9 18]) = 0
M = 7×3
0.0755 0.9933 0.5442 0.9886 0 0.9228 0.8358 0.5746 0.2469 0.2092 0.6053 0 0.6826 0.6172 0.6560 0.7813 0.7701 0.4630 0 0.4167 0.1692
n_zeros = 1; % one zero per column
M = reshape(M(M ~= 0),size(M)-[n_zeros 0])
M = 6×3
0.0755 0.9933 0.5442 0.9886 0.5746 0.9228 0.8358 0.6053 0.2469 0.2092 0.6172 0.6560 0.6826 0.7701 0.4630 0.7813 0.4167 0.1692

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