How to apply a function to an indexed array without loop

Is there a way to do the following

A = rand(100,2);
c = randi(5,[100,1]);

for i = 1:5
     B(i, :) = mean(A(c == i, :));
end

without a loop?

A is my input data, c is some sort of classification and mean could be any function. I tried

A(c == 1:5, :)

but this just gives me an error.

Answer 1

[Chris Perkins]

Hi Laura,

You might be able to re-structure your problem a bit and use "arrayfun", which applies a function to each value in the given array. See the following documentation link for more information:

https://www.mathworks.com/help/matlab/ref/arrayfun.html