Outputs for function in class method

Question

HYZ 2022-10-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1835193-outputs-for-function-in-class-method

回答： Walter Roberson 2022-10-25

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hi,

I have a script with classdef and method. the below is the structure of the script.

I woud like to create mymatrix from this script which can be used as obj.loadthis (1,mymatrix) in the command window. so in the command,

load ('mydata.mat')
V = testing(a,b,c)
mymatrix = V.makematrix (Mydata);
V.loadthis(1, mymatrix);

I have two questions:

if I can import mydata vector into methods like below. (I think I cannot use mydata just like this).
how can I write so make 'mymatrix' to be used as input for the subsequent function.

thanks a lot in advance!

classdef testing < handle
    properties
        ....
    end
    properties (Access = private)
        ...
    end      
      
methods
    function obj = testing (a, b, c)
        ....
    end
    
    function mymatrix = makematrix (obj, mydata)   %mydata vector was made from outside
            temp = struct('cdata',[]);
            for i = 1:60
                 Screen('DrawDots', obj.Window, mydata(:, :, i)',3, [255 255 255], [1920 1080], 0);                  
                 temp(frameIdx).cdata = Screen('GetImage', obj.Window);   
            end
          mymatrix  = double(cat(4,temp.cdata));
    end
    
    function loadthis(obj, VideoIndex, mymatrix)
        ...
    end
end
end
    
    

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Walter Roberson 2022-10-25

your class method makematrix must accept a class member as the first parameter, unless you make it a static method of the class.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2022-10-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1835193-outputs-for-function-in-class-method#answer_1083508

if I can import mydata vector into methods like below. (I think I cannot use mydata just like this).

Yes, now that you have made obj a parameter to the method, the call you used should work.

how can I write so make 'mymatrix' to be used as input for the subsequent function.

You already did.

The way you wrote it is unusual. It would be much more common to have made mymatrix into a property of the class, and to not return it from the method, and to not pass it as a parameter to the loadthis() method since it would already be a property accessible through obj.