how to call a get.properties method in a script
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Hi, I'm trying to use the get.propertie function on a private propertie.
classdef t_point2D
properties (Access = private)
X;
Y;
end
methods
%Defenir le constructeur
function point2D = t_point2D(X,Y)
if nargin == 0
point2D.X =0;
point2D.Y=0;
elseif nargin == 1 || nargin >2
fprintf('Error');
else
point2D.X = X;
point2D.Y = Y;
end
end
%accesseurs
function X = get.X(point2D)
X = point2D.X;
end
Then, I try to call it in a script :
point1 =t_point2D(2,8);
XX = get.X(point1);
I get the following error message : Undefined variable "get" or class "get.X".
Error in test (line 4) XX = get.X(point1);
I supposed I'm not calling the method the right way? I can't find the doc on how to call a get.prop function.
采纳的回答
Guillaume
2017-3-23
You have two problems:
1. You're using the wrong syntax for accessing properties. Regardless of the syntax used to define the property accessor, the way to access the property is just obj.propname, so:
XX = point1.X
2. The above won't help because the whole point of a private property is that it can't be accessed from outside the class. So if you want access to the X property you need to make it public (at least for GetAccess)
Note: As shown, your accessor function does not enable anything that wasn't already available without it. So if all you do is make X public, you may as well remove that function.
The following may be what you're after:
classdef Point2D
properties (GetAccess = public, SetAcces = private)
X;
Y;
end
methods
function this = Point2D(X, Y) %constructeur
%body of constructor
end
%No need for accessor, you can already do Point2D.X
end
end
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