MATLAB: How to store output of a for loop in a matrix

Question

Hi guys,

I'm having difficulty storing my output values from a loop into a matrix. And whenever I try the solution mentioned in other examples the error preallocate comes up.

My code is below:

P= [10 20 30]

A=1230

B=0.14

Idir=0

for index = 1:3

Idir=(A/(exp(B/sin(P(index)))))

end

Answer 1

Idir=zeros(size(P)); % this is how you preallocate before loop

Note: In this case you don’t need a loop.