not enough input arguments error for function

Good day everyone.

I'm new here, maybe someone can help me with the issue. Excually i try to use PDEModel Obletcs for my thesis and I try to use rhe example from matlab scripts http://fr.mathworks.com/help/pde/ug/scalar-functional-form-and-calling-syntax.html

There you have the function c represented as c = 1 + x2 + y2

And to write function in this xemple they suggest this code but when I copy it in my matlab i always have error of not enough inpout parametres

There is a code for this exemple

function c = cfunc(p,t,u,time)

% Triangle point indices
it1 = t(1,:);
it2 = t(2,:);
it3 = t(3,:);

% Find centroids of triangles
xpts = (p(1,it1)+p(1,it2)+p(1,it3))/3;
ypts = (p(2,it1)+p(2,it2)+p(2,it3))/3;

c = 1 + xpts.^2 + ypts.^2;

This function need to have p.t.u.time as variables for being compatible to a create pde model.

I hope for your answers. Thank you in advance

[Stephen23]

Please show us exactly how you are calling this function.

[Redikultseva Iuliia]

 The same way as in exemple 

c = @cfunc;

[Redikultseva Iuliia]

I give a link for this example so the c function script is in and of the text

http://fr.mathworks.com/help/pde/ug/scalar-functional-form-and-calling-syntax.html

[Redikultseva Iuliia]

Sorry to all i've found the answer. Thank you Stephen Cobeldick)) Have a good day