how to index a vector by another one?

idx=[-2,-1,0,1,2,3];

x=[6,5,2,1,8,0];

is there a way to get that x(-2)=6,...,x(3)=0

Answer 1

[Star Strider]

MATLAB indexing begins with 1 and includes all non-negative integers.

You have to do something like this:

idx=[-2,-1,0,1,2,3];
x=[6,5,2,1,8,0];
Result = x(idx+abs(min(idx))+1);

[Stephen23]

Why the abs? I am not sure that it helps. Perhaps:

Result = x(idx+1-min(idx))