MATLAB: How to use the ISMETHOD function to determine if an inherited method belongs to a derived object for classes created in MATLAB R2007b or before

classesinheritanceismethodMATLABmethodsobjectoopr2007ar2007b

I am using the MATLAB R2007b classes system, and I would like to use ISMETHOD to check if a particular method belongs to an instance of a derived class. However, if the method is defined is the base class ISMETHOD returns false.

Best Answer

The ability to do use ISMETHOD on methods defined in a base class is not available in the MATLAB classes system for MATLAB R2007b and before.

This functionality has been added in the MATLAB classes system starting with R2008a.

To work around this issue in releases prior to R2008a, search the output of the METHODS function using the '-full' parameter. For example, if 'd' is an instance of the derived class, and 'theMethod' is a method defined in the base class:

method_list = methods(d, '-full');
if any(strcmp(method_list, 'theMethod'))
      disp('theMethod is defined for d');
end

Related Solutions

MATLAB: Super class get callers name

Found it. Just call this:

 me = class(obj);

this gives the name of the created subclass. I call it in the constructor of the superclass:

 function obj = mySuperClass() %constructor
   me = class(obj);
   obj.name = me;
 end

MATLAB: Ismethod(string(‘test’), ‘endsWith’) under R2016b and 2018b

ismethod() calls upon methods(). methods() has two forms: it can be passed a class name, or an object. string('asd') is the same as "asd" and in all current versions, you can specify class names either as character vectors or as scalar string objects.

In R2016b when string objects had just been introduced, there were a lot of routines that had not been upgraded to accept string objects in place of character vectors or cell array of character vectors. Each release after that converted more and more routines. Most of them had been converted by R2018a, but R2018b release notes indicates changes continued even into R2018b, especially an new weird change to table(), timetable() and addVars() that is likely to lead to confusion.

Best Answer

Related Solutions

MATLAB: Super class get callers name

MATLAB: Ismethod(string(‘test’), ‘endsWith’) under R2016b and 2018b

Related Question