Finding matched rows of matrix with other matrix?

2 views (last 30 days)
Lets say we have two matrix.
A=[1 1]
B=[2 0;1 1;1 1;3 1]
Now second and third rows of B are same as matrix A. and I want to find indices of such rows. i.e 2 and 3
I have tried 'ismember' but it is giving just first matched row index i.e. 2 (code can be seen below)
Thanks
A=[1 1]
B=[2 0;1 1;1 1;3 1]
[L, M] = ismember(A,B, 'rows')

Accepted Answer

Gaganjyoti Baishya
Gaganjyoti Baishya on 24 Jun 2020
arr=[];
for i=1:size(B,1)
c=0;
for j=1:2
if B(i,j)==A(1,j)
c=c+1;
end
end
if c==2
arr=[arr i]
end
end
arr gives your required indices
  1 Comment
Ahmed Anas
Ahmed Anas on 25 Jun 2020
Thanks ,Gaganjyoti Baishya.
But i have also developed the code below:
A=[1 2];
B=[1 1;1 2;3 2;2 1;1 2;1 2];
Index=1;
for i=1:size(B,1)
Ismatched=ismember(A,B(i,:),'rows');
if Ismatched==1
MatchedRows(Index)=i;
Index=Index+1;
end
end
MatchedRows

Sign in to comment.

More Answers (0)

Tags

Products


Release

R2017a

Community Treasure Hunt

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

Start Hunting!