Creating a counter loop in MatLab, GUI?

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Amed 2013-1-25

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编辑： Irwin2020 2018-11-22

Hello, i'm trying to create a loop counter that will add increments of 1 every time I click a pushbutton. I don't really have any code as of yet since i'm new to programming but i've figured how to detect the button being pushed, and display a number in the static text. It keeps displaying '1', how do I display 1,2,3,.....n for every push? Here is what I have so far. Thanks a bunch

    a = 0;
if (handles.pushbutton5)
    a = a + 1;
    set(handles.text8,'string',a);
end;

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Jan 2013-1-29

@Azzi: As Walter has explained before when I've asked the same question, the "if true, ..., end" appears, when you hit the "code" button when no text is selected.

Wouter 2013-11-7

And what if I want the option to count backwards?

I've tried creating a second pushbutton that produces:

counter = get(hObject, 'UserData') - 1;

However, no effect.

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Jan 2013-1-29

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https://ww2.mathworks.cn/matlabcentral/answers/59835-creating-a-counter-loop-in-matlab-gui#answer_72735

在 MATLAB Online 中打开

I would avoid mixing the string and the numerical representation, although both are equivalent in this case. So you can add in the opening function:

set(handles.pushbutton5, 'UserData', 0);

and in the callback of this pushbutton:

function pushbutton5_Callback(hObject, EventData, handles)
counter = get(hObject, 'UserData') + 1;
set(hObject, 'UserData', counter);
set(handles.text8, 'String', sprintf('%d', counter));

If the field "text8" is missing, see FAQ: incomplete handles struct

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Jan 2013-1-29

It initialized the UserData property to 0. Otherwise the default is [].

Irwin2020 2018-11-22

编辑：Irwin2020 2018-11-22

Jan , can you please help me create a counter -loop adding strings (Hex values)?

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更多回答（3 个）

Azzi Abdelmalek 2013-1-25

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在 MATLAB Online 中打开

set(handles.text8,'string',num2str(a));

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Azzi Abdelmalek 2013-1-25

Look at the above code

Azzi Abdelmalek 2013-1-25

在 MATLAB Online 中打开

In opening function initialize

Set(handles.text8,'string','0')

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Amed 2013-1-25

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编辑：Amed 2013-1-25

在 MATLAB Online 中打开

Anybody else?

i initialized it as

set(handles.text8,'string','0')
a = str2double(get(handles.text8,'string'));
if (handles.pushbutton5)
    a = a + 1;
    set(handles.text8,'string',a);
end;

but get a constant '1' answer every click.. it will not add +1 to each click and display

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Azzi Abdelmalek 2013-1-29

编辑：Azzi Abdelmalek 2013-1-29

The initialization is not in the right place. You should do it in your opening function, not in your pushbutton function

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Amed 2013-1-29

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此回答的直接链接

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Anybody else have any ideas? Still not solved

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Jan 2013-1-29

编辑：Jan 2013-1-29

Please post comments in the comment section and not as an answer. Thanks.

simran 2013-4-28

put your initial value for counter in Property Inspector's User data property but not in pushbutton callback function. This will increment counter on every click of push button.

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