A simple problem in creating graph

when i try to create a graph (with the code below), there is a error ('' Undefined function 'G' for input arguments of type 'char'.'') , how can i solve it. İ just try the example of the matlab2013a, and I still have the same error.

G := Graph::createCompleteGraph(3):
Graph::printGraphInformation(G)

Answer 1

[the cyclist]

Do you have the Symbolic Math Toolbox? The graph theory commands won't work without it.

[Saman]

yes, I have the Symbolic Math Toolbox.