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
2023년 8월 5일
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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the cyclist
2023년 8월 5일
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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