Hi Caleb,
You can use the function isnan to check if an element of A is not a number. In your case, I would go through every element of A, check if it is NaN and replace it with your formula using C. This can be done with a simple for loop as follows:
for row=2:size(A,1)
for col=1:size(A,2)
if isnan(A(row,col))
A(row,col) = A(1,col) * C(row-1);
end
end
end
I hope that helps!
-Bruno
