get elements at x from array A without loop
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Commented: Daniel Neubauer on 11 Oct 2022
so, i have an array A=(1,2,3,4,5,6,7,8,9) and another array containing indexes B=(1,1,3,6,7,5,4). How to get a third one based on B such that C=[A(1),A(1),A(3),A(6),A(7),A(5),A(4)]?
I know how to do this by looping through b with i=1:length(B) and taking C(i)=A(B(i)) but would prefer to do this without any loop due to my real data being considerably larger than this example.
I'm new to matlab, any help is highly appreciated. thanks!
Fangjun Jiang on 11 Oct 2022
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