Type-Incomplete Matlab Equality Support

Question

Why can't I compare specific types such as, function handles, using the == operation in Matlab?

For instance

@prod == @sum

fails with error

Undefined function 'eq' for input arguments of type 'function_handle'.

Does this mean that this type can support comparison if we just specify overload == for function_handle types?

Answer 1

To test equality of function handles, use the ISEQUAL command instead:

>> isequal(@prod, @sum)

ans =

     0

>> isequal(@prod, @prod)

ans =

     1