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

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Manh Duc Luong
Manh Duc Luong2021-10-17
评论: Manh Duc Luong ,2021-10-19
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'.

回答(2 个)

the cyclist
the cyclist 2021-10-17
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.
  3 个评论
Walter Roberson
Walter Roberson 2021-10-17
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.

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