select a portion of the matrix
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Hi! I have the matrix 'matrix_C'. How can I stop (in this case) at the fifth row, i.e. when column 2,3,4 have 0 and column 5 a number?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1450982/image.png)
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Star Strider
on 5 Aug 2023
One approach —
LD = load('matrix_C.mat');
C = LD.C
idx = find(sum(C(:,[2 3 4])==0,2)==3, 1);
Result = C(1:idx,:)
.
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More Answers (1)
the cyclist
on 5 Aug 2023
The following does what you asked for, for this matrix. The "rule" you specified was not perfectly clear to me, though, so this may not generalize to other matrices in the way you want.
load("matrix_C.mat","C")
C
indexToLastRow = find(all(C(:,2:4)==0 & C(:,5)~=0,2),1);
C(1:indexToLastRow,:)
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