I would like to remove zeros from my matrix

Question

Ashkan Rigi 2021-10-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1572283-i-would-like-to-remove-zeros-from-my-matrix

回答： Walter Roberson 2021-10-27

a=[0 0 0; 0 0 0; 1 2 3; 4 5 6]

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LeoAiE 2021-10-26

编辑：LeoAiE 2021-10-26

在 MATLAB Online 中打开

a=[0 0 0; 0 0 0; 1 2 3; 4 5 6]
a = 4×3
     0     0     0
     0     0     0
     1     2     3
     4     5     6
a(a>0) % the results would be a column vector 
ans = 6×1
     1
     4
     2
     5
     3
     6
% Or try to remove the row or the columns with zeros
a(1:2,:) = [] 
a = 2×3
     1     2     3
     4     5     6
a
a = 2×3
     1     2     3
     4     5     6

Rik 2021-10-27

@Aladdin, this is an answer to what might be a homework question. Please consider either moving your comment to the answer section (by deleting this and reposting it) or deleting your comment.

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Answer 1

Walter Roberson 2021-10-27

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1572283-i-would-like-to-remove-zeros-from-my-matrix#answer_817473

在 MATLAB Online 中打开

a = [0 0 0; 0 0 0; 1 2 3; 4 5 6]
a = 4×3
     0     0     0
     0     0     0
     1     2     3
     4     5     6
b = rmmissing(standardizeMissing(a, 0))
b = 2×3
     1     2     3
     4     5     6