starting with oop

Hi, I just started playing with oop in Matlab. Dont have any other oop experience, so I seem to get lost in the first steps alerady. when I try to call teh following class

classdef myclass
  %MYCLASS Summary of this class goes here
  %   Detailed explanation goes here

    properties
       t1
    end

    methods
        function obj=myclass(arg1)
           obj.t1=myclass.p(arg1); 
        end
    end

    methods (Static)
        function p = pi(tol)
            [n d]=rat(pi,tol);
            p=n/d;
        end

    end
end

I always get the error

The class myclass has no property or method named 'p'.

How can I prevent that error?

Cheers

Answer 1

[David Young]

You need to replace

obj.t1=myclass.p(arg1);

with

obj.t1=myclass.pi(arg1);

You're making the (I suspect quite common) mistake of using the output variable name from the function instead of the name of the function itself.

If you make that change, the constructor runs:

>> m = myclass(3)

m = 

    myclass

    Properties:
      t1: 3

Does that do what you expect now?

[Christof]

that was the mistake. thanks.

another question, though. if I define the method as a regular method, not as a static method, I cant call it from the constructor. is there a way to do?

[David Young]

Yes, if pi is not static, you can do

obj.t1 = obj.pi(arg1);

By the way, it would be better to avoid "pi" as a method name, so that it can't be confused with the inbuilt function pi.