在 GUI 的回调中使用函数

发布于 2024-11-05 18:10:31 字数 811 浏览 7 评论 0原文

我正在使用 GUIDE 创建一个界面，其中单击按钮时将执行函数 [x,y]=function(a,b,c,d) 。我在让它发挥作用时遇到问题。 GUIDE 使用语法 varargout = LineasA(varargin) 创建自动生成的函数。

我使用此语法 [x,y]=LineasA(a,b,c,d) 调用 GUI。

我得到的错误是：

Error in ==> LineasA>LineasA_OutputFcn at 73
varargout{1} = handles.output;

??? Error using ==> feval
Output argument "varargout{2}" (and maybe others) not assigned during call to
"C:\Users\ZeTa\Documents\MATLAB\ImagenB\LineasA.m>LineasA_OutputFcn".

Error in ==> gui_mainfcn at 263
        [varargout{1:nargout}] = feval(gui_State.gui_OutputFcn, gui_hFigure, [],
        gui_Handles);

Error in ==> LineasA at 40
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

Error in ==> ImagenB at 17
[MatrizB,Cuenta]=LineasA(Cuenta,waveformObj,channelObj,MatrizB);

原文

I'm using GUIDE to create an interface where a function [x,y]=function(a,b,c,d) will be executed when the button is clicked. Im having problems to get this to work. GUIDE creates an autogenerated function with the syntax varargout = LineasA(varargin).

I'm calling the GUI using this syntax [x,y]=LineasA(a,b,c,d).

Errors I get are:

Error in ==> LineasA>LineasA_OutputFcn at 73
varargout{1} = handles.output;

??? Error using ==> feval
Output argument "varargout{2}" (and maybe others) not assigned during call to
"C:\Users\ZeTa\Documents\MATLAB\ImagenB\LineasA.m>LineasA_OutputFcn".

Error in ==> gui_mainfcn at 263
        [varargout{1:nargout}] = feval(gui_State.gui_OutputFcn, gui_hFigure, [],
        gui_Handles);

Error in ==> LineasA at 40
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

Error in ==> ImagenB at 17
[MatrizB,Cuenta]=LineasA(Cuenta,waveformObj,channelObj,MatrizB);

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赢得她心 2024-11-12 18:10:31

您必须清楚从何处获取此函数的输入以及您希望输出到何处。将输入和输出存储在传递给回调的句柄结构中是正确的编码。另外，正确的回调结构是：

LineasA(hObject, eventdata, handles)

但是，如果您坚持从基础工作区调用和存储，则可以执行以下操作：

LineasA(hObject, eventdata, handles)
    % grab values from base workspace
    Cuenta = evalin('base', 'Cuenta');
    waveformObj = evalin('base', 'waveformObj');
    channelObj = evalin('base', 'channelObj');
    MatrizB = evalin('base', 'MatrizB');

    % the rest of your code

    % assign outputs
    assignin('base', 'MatrizB', matrizB);
    assignin('base', 'Cuenta', Cuenta);
end

但是我建议在句柄结构中获取这些值，而不是使用 evalin 和 allocatein，它们通常是不好的编码技术。

You have to be clear where you are getting the inputs to this function, and where you want the outputs to go. It is proper coding to store the inputs and outputs in the handles struct that is passed into the callback. Also, the proper callback structure is:

LineasA(hObject, eventdata, handles)

However, if you insist on calling and storing from the base workspace, you can do as follows:

LineasA(hObject, eventdata, handles)
    % grab values from base workspace
    Cuenta = evalin('base', 'Cuenta');
    waveformObj = evalin('base', 'waveformObj');
    channelObj = evalin('base', 'channelObj');
    MatrizB = evalin('base', 'MatrizB');

    % the rest of your code

    % assign outputs
    assignin('base', 'MatrizB', matrizB);
    assignin('base', 'Cuenta', Cuenta);
end

However I recommend getting those values in the handles structure and not to use evalin and assignin, they are usually bad coding techniques.

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