Mapping indices of matrices with differing dimension

This seems simple, but I cannot find an answer to my specific question. Take the matrices below:

x = [5 3 7 0 1];

y = [1 3 3 1; 2 2 2 2; 3 5 5 3; 1 3 3 1];

I'd like to create a new matrix 'z' that takes each element of 'y' and pulls the value of 'x' using the 'y' value as an index of 'x':

z = [5 7 7 5; 3 3 3 3; 7 1 1 7; 5 7 7 5];

Kind of like x(y) but for matrices of differing dimension.

My real question is whether this can be done without a for loop, since I'm new to MATLAB and not as familiar with matrix manipulation as I could be.

Answer 1

[Guillaume]

Well have you try x(y)? It will give you exactly your desired z.

Note that the rule of A(B) indexing is that it is the same shape as B unless both A and B are vectors (in which case, absurdly, it is the same shape as A).