x = 1:100;
y = 201:300;
a = 250;
I know that
will return 50, the value of x corresponding to the y index where y = a. Now if a has multiple elements, I'd like to find all the values of x corresponding to all the values of y where y equals any of the values in a. For example, if
I'd like to efficiently get the array [50; 15; 83]. How can I do this?