How to find elements of an array by using another array elements as indices

Hi everyone,

Let's say

A= [2 5 4 3 5 7 5 6 8 2 8 4 3 1 4];
B= [1 3 4 7];

I need to find elements of A by using elements of B as indices of elements of A. In other words, I need 1st, 3rd, 4th and 7th elements of A and information of indices is given in B. Is this possible without using for loop? If yes, how? I am glad if you can help.

[Stanislao Pinzón]

You can use

A(B)

[madhan ravi]

Stanislao I suggest you to move it as an answer since it answers the question.

Answer 1

[Ang Feng]

Matlab allows you to acces elements of a matrix in serveral ways. In your case, try this

A(B)

I have this results from Matalab

A(B)

ans =

     2     4     3     5

, which is what you are looking for.

Other ways of indexing a matrix can be found here

https://nl.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

[Cenk Bursali]

Thank you. It is a very useful method.