Assign a letter to a set of (for example) real numbers?

I am going through a book which is teaching the basics of m files, and one loop they have done is:

for i = 1:m

for j = 1:n

A(i,j) = a/(i + j - 1);

end

end

A

However matlab doesn't understand what " i = 1:n" means, and neither do I. I am guessing it is the set of all real numbers or integers from 1 to n, but maybe because it hasn't been set, matlab doesn't know what it is?

How would I fix this?

Answer 1

[Azzi Abdelmalek]

No, the problem is that n, m & a are unknowns!

set for example

n=2;
m=2;
a=10
for i = 1:m
 for j = 1:n
    A(i,j) = a/(i + j - 1);
 end
end

Answer 2

[Sean de Wolski]

m = 5;
n = 6;
a = 10;
A = bsxfun(@(ii,jj)a./(ii + jj - 1),(1:m).',1:n)

Answer 3

[Ahmad Rizal]

m=4 if m>3 a=k; end