MATLAB: error when I try to access property of object

Question

This is the error it returns: You cannot get the 't' property of Planet.

Error in Problem4dot10 (line 12) name=mercury.t(mercury);

I created getter functions to return properties of the class planet:

methods %for getter functions
        function t=get.t(obj)
            t=obj.t;
        end
        function r=get.r(obj)
            r=obj.r;
        end
        function x=get.x(obj)
            x=obj.x;
        end
        function y=get.y(obj)
            y=obj.y;
        end
        function vx=get.vx(obj)
            vx=obj.vx;
        end
        function vy=get.vy(obj)
            vy=obj.vy;
        end
        function n=get.n(obj)
            n=obj.n;
        end
        function n=get.Name(obj)
            n=obj.Name;
        end
    end

And I called the getter from the file Problem4dot10.m:

mercury=Planet(1,0.002,0,2*pi,1,0,'Mercury');
mercury.sett(60);
name=mercury.t(mercury);

I looked at the documentation to try to figure out it out. What I'm trying to do is create a planet class that keeps track of the position of the planet, and also calculates where the planet is in the next time step. It then assumes that new state.

can you update the example to include the property definition? — janh, Apr 12 '14 at 14:48

score 0 · Answer 1 · answered Feb 05 '14 at 06:46

It seems to me that the t property is private. You can make it public using, e.g.:

properties(SetAccess = public, GetAccess = public)
    t = 0;
end

or

properties(Access = public)
    t = 0;
end

Also you don't need to pass mercury into t getter method. name=mercury.t; should be enough.

MATLAB: error when I try to access property of object

1 Answers1