Create a new matrix
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Let A a matrix and B a vector defined by :
A=[ 4 2
7 4
3 5
6 8
8 1];
B= [4 6 7 8];
I wish to know how to create a new matrix C which is a part of matrix A but necessary contain an element of the vector B, given by
C = [ 7 4
6 8];
If anyone could help , I'd greaty appreciate it.
2 个评论
Sam Chak
2022-4-18
Sounds like an IQ puzzle.
What is the governing rule for the contruction of Matrix 
?
?A brief glance at Matrix 
shows that:
shows that:C = [A(2,:); A(4,:)]
Walter Roberson
2022-4-18
C = A([2 4],:)
采纳的回答
A=[ 4 2
7 4
3 5
6 8
8 1];
B= [4 6 7 8];
C = A(all(ismember(A,B),2),:)
4 个评论
Yamina chbak
2022-4-18
Yamina chbak
2022-5-12
This code select the first two matched if there is more than 2 (like the last row of A):
A=[ 4 2 5
7 4 3
3 5 1
6 8 1];
B=[5 8 2 6 1];
At = A.';
tf = ismember(At,B);
tf = tf & cumsum(tf,1)<=2;
C = reshape(At(tf),2,[]).'
Yamina chbak
2022-5-12
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