find dublicated value in a column and return the whole row

imagine I have this:

A = [ 1 ; 3 ; 5 ; 6 ; 9 ]

and

B = [ 1 4 ; 2 7 ; 3 5 ; 9 10 ]

I need to end up with:

C = [ 1 4 ; 3 5 ; 9 10 ]

In B(:,1) column I need to find those from A that match, and if so, return the full rows of B. Hope I am clear

Answer 1

[madhan ravi]

A = [ 1 ; 3 ; 5 ; 6 ; 9 ]

B = [ 1 4 ; 2 7 ; 3 5 ; 9 10 ]

idx=ismember(B(:,1),A)

C = B(idx,:)

[madhan ravi]

If it answers your question please accept the answer so that other people know the question had been solved

[Martin]

thanks bro

[madhan ravi]

Anytime :)