Perform a function on each value of a vector in matlab?

Question

I have a vector, a, shape (10000,1) filled with values. I also have vector b, same shape, filled with zeros. I want to take my function, apply it to each value in vector a, return those values into vector b. Below is what I tried, as well as a few variations of this. How can I perform this function on each value of the vector and replace each zero in vector b with what that function returns?

for i=1:length(a)
    b(i) = function(a)
end

Answer 1

You can use arrayfun to do this

b = arrayfun(@someFunction, a); % Calls b(i) = someFunction(a(i)) for all elements of a

(Although it's common in MATLAB to try and make someFunction be " vectorised ", so that you can instead say simple b = someFunction(a) )