Parse error at')':

i got 3 errors here:

• the function keyword use is invalid here
• parse error at ')':
• parse error at ELSE:

can somebody tell me how to fix this

pilih=get(handles.uibuttongroup1, 'Value');
handles.pilih=pilih;
guidata(hObject, handles)

if(pilih==1)
    function[G] = ambang(F,t);
    [m,n] = size(F);
        for i = 1:m
        for j = 1:n
        if F(i,j) <=t
        G(i,j) = 0;
        else
        G(i,j) = 1;
        end
        end
        end
    end
    
else if (pilih==2)
 function[G] = arasjamak(F,t1,t2)
    [m,n] = size(F);
    for i = 1:m
    for j = 1:n
    if F(i,j) <=t1 || F(i,j) >=t2
    G(i,j) = 0;
    else
    G(i,j) = 1;
    end
    end
    end  
 end
 
else if(pilih==3)
    level = graythresh(j);
    BW = im2bw(j,level);
    imshow(BW);    
        
    end

Answer 1

[Cris LaPierre]

You cannot define a function inside an if statement. If you want to include a helper function, ir must be defined at the bottom of your script, or in a separate file. See here for more.

[Zefanya Rumpesak]

Thanks! very helpful!