To find the value in a vector for the corresponding indices from another vector

Hi Everyone,

I have small issue in finding the values from a vector for the corresponding indices from another vector. for ex:

If I have a vector:

aa = [0.023 0.987 0.112 0.666 0.2734, .... , 0.6667]; % say dimension of 1x1000

and

bb = [34 12 67 87 76 83 11 97 23 112 298]; % say dimension of 1x50 (which are the index values for which I want the corrsponding values from aa.

I don't want to use a for loop!!

I did something wrong like

cc = aa(bb(1:end));

error message: Index exceeds matrix dimensions. %(because it does not make sense)

Can anyone suggest me any solution! It would of great help.

Thanks in advance!

Cheers, Savan

Answer 1

[the cyclist]

Your largest value of bb must be longer than the length of aa.

You can check this by comparing

max(bb)

with

length(aa)

Answer 2

[Gopichandh Danala]

There is nothing wrong in your code, maybe some of the indices in bb are higher than length of aa, which is giving that error.

Just verify

logical(max(bb) < length(aa))

if its true (1), there is no problem , if its false (0) some index in bb is higher than length of aa and causing the error