what @ does in MATLAB?

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Md Jonayet
Md Jonayet 2023-4-19
编辑： per isakson 2023-4-20
I have a class name VI_Lecroy.
function obj = VI_SDA6000(varargin)
obj = obj@VI_LeCroy(varargin{:});
end
What this @ does?
  2 个评论
Luca Ferro
Luca Ferro 2023-4-19
i think it is a function handle but i might be mistaken
Walter Roberson
Walter Roberson 2023-4-19
@Luca Ferro
@ in other contexts is used for function handles, but in the context of being in the middle of a pair of words, is a superclass reference.

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chicken vector
chicken vector 2023-4-19
编辑：chicken vector 2023-4-19
In this case @ is used to call a superclass method from a subclass.
Consider the classes Food and Donut, such that Donut is a subclass of Food.
If Food has a method eat, you can call this method from the subclass Donut using the operator @:
%% Food class:
classdef Food
methods
% Constructor
function obj = Food(varargin)
...
end
function eatenFood = eat(varargin)
...
end
end
end
%% Donut class:
classdef Donut < Food
methods
% Constructor
function obj = Donut(varargin)
...
end
function eatenDonut = eat(varargin)
eatenDonut = eat@Food(varargin)
end
end
end
In particular, obj@Food calls the constructor method that is used to define class instances.
This is the method that has the same name of the class itself.
It follows that:
function obj = VI_SDA6000(varargin)
obj = obj@VI_LeCroy(varargin{:});
end
implies that the instances of the class VI_SDA6000 are constructed in the same way as done in VI_LeCroy.
You can find more detailes here.

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