ERROR - Error using zajimava_uloha (line 7) Not enough input arguments. Why?

function pravd = zajimava_uloha(n)
% pravd = zajimava_uloha(n)
%
% vypocte pravdepodobnost toho, ze kdyz nahodne zamichate prirozena
% cisla 1 az n, nezustane ani jedno cislo na sve puvodni pozici

if n <= 0 , n - floor(n) > eps
    error('n neni prirozene cislo')
end

perm = permutace(n); % generuje vsechna mozna usporadani n cisel
pocet_perm=size(perm,1); % pocet vsech moznych usporadani n cisel

for i=1:pocet_perm
    pom(i,:)=[1:n];
end

   P=(pom==perm); 
   pom2=sum(P,2);
   pom2=~pom2;
   suma=sum(pom2); % pocet vsech usporadani, u kterych neni ani jedno cislo na svem puvodnim miste

   pravd=suma/pocet_perm;

   disp(['Pravdepodobnost: ', num2str(pravd)])

% konec

[Daniel Shub]

Please format the code properly. If you could point out line 7 that would also be help. Finally provide the entire error stack.

Answer 1

[Sean de Wolski]

How are you calling zajimava_uloha? If you are just using the green "play" button, n the lone input argument will be undefined and you will see this error.

To run this function properly, call it with one input argument, maybe:

zajimava_uloha(pi)