how to access array with data in another array matlab

Question

Assume I have array A and B

B contain data that index array of Array A

( Example B(1,:) = [2 3] it mean that I want to access data of array A(2,3) )

I want to show the all data A that have in B

I try to code like this

A(B(:,1),B(:,2))

however when I try to run the program it seem wrong ( like I have B contain data 100 x 2 it should produce 100 results but it produces 200 instead)

Luis Mendo · Accepted Answer · 2014-03-08 00:09:41Z

1

You need sub2ind:

A(sub2ind(size(A),B(:,1),B(:,2)))

answered Mar 8, 2014 at 0:09

Luis Mendo

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