What Does Each Element of This Syntax Mean?

Question

Rightia Rollmann 2017-3-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331955-what-does-each-element-of-this-syntax-mean

评论： Jan 2017-3-27

采纳的回答： Jan

I create a push button in GUIDE. When I create a callback function for it, it automatically creates the syntax below:

Could you please explain what each element of this syntax mean?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2017-3-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331955-what-does-each-element-of-this-syntax-mean#answer_260399

在 MATLAB Online 中打开

@() means the creation of an anonymous function.
@(hObject, eventdata) is an anoynmous function with 2 inputs.
The body of this anonymous function is

PushButton('pushbutton1_Callback', hObject, eventdata, guidata(hObject))

(Dull formatting in th forum, this is 4.!) This means, that the function "PushButton" is called with the 2 inputs of the anonymous function and as 3rd input the current value of the handles struct is obatined from the figure.

To reduce the levels of indirection and for simplicity this might be a valid callback also:

@pushbutton1_Callback

with this definition of the function:

function pushbutton1_Callback(hObject, eventdata)
handles = guidata(hObject);
...

2 个评论
显示无隐藏无

Rightia Rollmann 2017-3-26

Thanks! Could you give me another example (preferably, an example that can be run as a script) of such code? I am stilling struggling with its syntax.