Save vales in Harry in a for loop

my problem is that i do not know how to store the calculated values from my for loop:

here are examples from my tries:

First:

>> 
Ri_A=0;
for i=1:15
    Ri_A(i)=Ri_A+(numbA_IntStat(i)./(E_i.*cos(numbGrad(i)).*ds)); 
end
% Unable to perform assignment because the left and right sides have a different number of
% elements.
 

Second:

Ri_A=0;
for i=1:15
    Ri_A=Ri_A+(numbA_IntStat(i)./(E_i.*cos(numbGrad(i)).*ds)); 
    Ri_A()=Ri_A(i); 
end

%Error Message:      
% Ri_A()=Ri_A(i); 
%     ↑
% Error: An indexing expression on the left side of an assignment must have at least one
% subscript.

Answer 1

[David Hill]

No loop needed.

Ri_A=numbA_IntStat./(E_i.*cos(numbGrad).*ds);%assuming all the same sized variables 

[darova]

I think it could work