error while executing Mat lab commend

phi=chebfun2(@(phi,p) phi, V2); ??? Undefined function or method 'chebfun2' for input arguments of type 'function_handle'.

Answer 1

[A Jenkins]

Type which chebfun2.

If it says the function is not found, it means you may not have the package you need installed. You could google it or ask the person you got the code from where to get it. If it is installed but still not found, you may need to add it to your path.