# Finding a row with a certain value and the next nth rows after that

조회 수: 14(최근 30일)
Me Me 18 Feb 2021
댓글: Me Me 21 Feb 2021
Hi
I would like to find a row with a specific value and the next nth rows after that.
0.8147 0.0975 0.1576 0.1419 0.6557
0.9058 0.2785 0.9706 0.4218 0.0357
0.1270 0.5469 0.9572 0.9157 5
0.9134 0.9575 0.4854 0.7922 0.9340
0.6324 0.9649 0.8003 0.9595 0.6787
0.9134 0.9575 0.4854 0.7922 5
0.6324 0.9649 0.8003 0.9595 0.6787
0.6324 0.9649 0.8003 0.9595 0.6787
So in the above example, i would like to find the last column == 5 and then the next two rows and extract those.
I know how to index and find column ==5 , but not how to find the next two rows.
thanks
##### 댓글 수: 4표시숨기기 이전 댓글 수: 3
Me Me 21 Feb 2021
Okay, Thanks for the help! and sorry for not being clear.
Matt J's answers was what i was looking for excatly :D

댓글을 달려면 로그인하십시오.

### 채택된 답변

Matt J 18 Feb 2021
편집: Matt J 18 Feb 2021
Here's an approach that uses logical indexing only:
A=[ 0.9058 0.2785 0.9706 0.4218 0.0357
0.1270 0.5469 0.9572 0.9157 5
0.9134 0.9575 0.4854 0.7922 0.9340
0.6324 0.9649 0.8003 0.9595 0.6787
0 1 2 3 0.4
0 1 2 3 0.4
0.9134 0.9575 0.4854 0.7922 5
0.6324 0.9649 0.8003 0.9595 0.6787
0.6324 0.9649 0.8003 0.9595 0.6787
0 1 2 3 0.4];
idx = movmax(A(:,end)==5,[2,0]);
A(idx,:)
ans = 6×5
0.1270 0.5469 0.9572 0.9157 5.0000 0.9134 0.9575 0.4854 0.7922 0.9340 0.6324 0.9649 0.8003 0.9595 0.6787 0.9134 0.9575 0.4854 0.7922 5.0000 0.6324 0.9649 0.8003 0.9595 0.6787 0.6324 0.9649 0.8003 0.9595 0.6787

댓글을 달려면 로그인하십시오.

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by