find index conditional on two vectors

Hi,

I have two vectors =

resp = [1 2 3 1 1 2 3 3 3 1];

fing = [1 2 1 2 1 1 1 2 2 1];

How do I find the indices of resp where resp ==1 and fing ==1 (for instance in this example, this would be index 1 of resp, index 5 of resp, and index 10 of resp)?

Many thanks

Answer 1

[Adam]

find( resp == 1 & fing == 1 );

If you don't need the actual linear indices though then the logical vector returned by just

resp == 1 & fing == 1

will work as an index into other arrays if needed and is more efficient than finding the linear indices first.

[MiauMiau]

oh my, so simple...I was trying find(resp(resp==1&fing==1)) which delivered indices of the subset. Many thanks

Answer 2

[KSSV]

clc; clear all ;
resp = [1 2 3 1 1 2 3 3 3 1];

fing = [1 2 1 2 1 1 1 2 2 1];
idx1 = find(resp==1) 
idx2 = find(resp==2)

[MiauMiau]

?? That is not answering my question at all. Where are you making use of "fing" in your example..?