I have been working on this code. But it's kept showing me this error. Please help me

A = [1 0; -1 3];
n = numposel(A)
function res = numposel(A)
[rows, cols] = size(A);
res = 0;
for i=1:rows
    for j =1:cols
        if (A(i,j)>0)
            res=res+1;
        end
    end
end
end

Unrecognized function or variable 'numposel'.

Answer 1

[the cyclist]

How are you trying to run that code?

If you just try to run those lines from the Command Window, it will give that error. The reason is that it will try to call the function before it has been defined.

If you put all of that code into an M-file, and then execute the code, it will work.

[Manh Duc Luong]

It works !

But how can I save that code and execute it when doing on the matlab grader?

[the cyclist]

I don't have any experience with MATLAB Grader.

But, you don't really need to define that function, right? It is easy to make that code work directly, without using a function.

[Walter Roberson]

MATLAB Grader expects a file, if I recall correctly.

And if not, then you can copy and paste all the lines into the MATLAB Grader window. Grader is able to accept "scripts" that include function definitions.

Answer 2

[Cris LaPierre]

You likely just need to enter the function code into MATLAB Grader

[Manh Duc Luong]

it worked well!

thanks