What to put as input to create adjacency matrix for graph function?

I have been trying to use the graph function of MATLAB using logical adjacency matrix but the function isn't taking any 'double' or 'logical' input. Even for the inputs given in example of the documentation, it is given me the same error: "Undefined function 'graph' for input arguments of type 'double'."

[Jeevan Joishi]

Check if the toolbox is properly installed or if the function is shadowed by some other function. You can execute the following command to see if there MATLAB is able to find the function 'graph'

>> which -all graph