error to compile function

[Luca Salardi]

hi,
i write this code:

function eserciziFunzioni2=mini(x)
   eserciziFunzioni2 = x(1);
   for i=2:length(x),
   if x(i) < eserciziFunzioni2 
        eserciziFunzioni2 = x(i);
        end;
        end;
endfunction


i try do compile it i receive this error:

甤>> eserciziFunzioni2

error: 'x' undefined near line 2 column 24
error: called from
    eserciziFunzioni2 at line 2 column 22


is it logical to receive errors in compiling functions where I do not pass
any parameters?






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