got confuse .. where is my mistake

what should i do to solve OR where is my mistake

function summa = eja(A)
summa = 0;
[r c] = size(A);
for i = 1:r
    summa = summa + (sum(A(r>=c)));
end
end

Answer 1

[Alan Stevens]

c is fixed as the last column. So in

[r c] = size(A);
for i = 1:r
    summa = summa + (sum(A(r>=c)));
end

you are trying to sum the values of just those rows that are equal to or greater than the number of columns.

[Abdur Rob]

yes sir ... but not working with this

[Abdur Rob]

[Abdur Rob]

sir have a look its giving this output

[John D'Errico]

I would add:

When you write a function, in this case called halfsum, you should put the function name in the header line.

You called it eja. Instead, you want to do this:

function summa = halfsum(A)

And then name the m-file as halfsum.m. Things will get confusing and problematic otherwise.

[Alan Stevens]

@Abdur Rob Yes. That's what I said! I showed the lines that were giving the trouble. The following will do the sum you want:

function summa = eja(A)
summa = 0;
[r, c] = size(A);
for i = 1:r
    summa = summa + sum(A(i,i:c));
end
end

[Abdur Rob]

thank you sir