help im getting this error

zerocross(F, ukuran, sigma)

Unrecognized function or variable 'ukuran'.

i got that message here's my code

function [K] = zerocross(F,ukuran,sigma)
% ZEROCROSS Pemerolehan tepi objek pada citra F
% melalui operator Marr-Hildreth
% Hasil: citra K
H = cadarLoG(ukuran,sigma);
pembulatan = false;
potong = true;
G = deteksi(F, H, potong, pembulatan);
% Proses zero crossing
K = zeros(size(G));
[m, n] = size(K);
for y=2 : m-1
    for x=2: n-1
        jum = 0;
        for p = x-1 : x
            for q = y-1 : y
                jum = jum + G(q,p);
            end
        end
        rerata0 = jum / 4;
        jum = 0;
        for p = x-1 : x
            for q = y : y+1
                jum = jum + G(q,p);
            end
        end
        rerata1 = jum / 4;
        jum = 0;
        for p = x : x+1
            for q = y-1 : y
                jum = jum + G(q,p);
            end
        end
        rerata2 = jum / 4;
        jum = 0;
        for p = x : x+1
            for q = y : y+1
                jum = jum + G(q,p);
            end
        end
        rerata3 = jum / 4;
        terbesar = max([rerata0 rerata1 rerata2 rerata3]);
        terkecil = min([rerata0 rerata1 rerata2 rerata3]);
        if (terbesar > 0) && (terkecil < 0)
            K(y,x) = 255; 
        end
    end
end
return

[DGM]

How are you calling the function?

[al rezi]

zerocrossing

[Torsten]

You didn't supply values for F, ukuran and sigma when calling

K = zerocross(F, ukuran, sigma)

[al rezi]

i still dont gei it

[DGM]

If you were calling the function without any arguments, that's not the error you would be getting.

% these variables exist in a different scope
% they have nothing to do with the A,B,and C which are local to myfunct
A = 1; 
B = 2; 
C = 3;

myfunct % improperly calling the function without any inputs or outputs

Not enough input arguments.

Error in solution>myfunct (line 10)
x = A; % error occurs when you try to use a missing argument

function out = myfunct(A,B,C) % requires 3 input arguments
    x = A; % error occurs when you try to use a missing argument
    y = B;
    z = C;
    out = x + y + z;
end

Answer 1

[Walter Roberson]

zerocross(F, ukuran, sigma)

at the time you invoked zerocross with that line, you had not defined ukuran. Possibly you had not defined sigma either, but you had defined F