That function only works inside the MuPAD Notebook interface, not inside a MATLAB function or at the MATLAB Command Prompt [*]. You will need Symbolic Math Toolbox to use that capability. If you have this toolbox installed (you can check this using the ver function) you can open a MuPAD Notebook using the command:
mupad
Inside that Notebook, to the right of the [ prompt, type the following:
G := Graph([a, b, c], [[a, b], [b, c]]):
Graph::bipartite(G, Lists);
Graph::bipartite(G, Bool)
[*] Technically it is possible, via the use of the evalin and feval methods of symengine, to execute these commands from inside a MATLAB function or at the prompt, but it's not so easy to execute a group of commands at once.
