How do I use uicontrol to assign a value to a variable?

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Marcus Blackburn 2017-3-27

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回答： Nanda Gupta 2017-3-29

If i have a uicontrol pushbutton, how do I make it so that when a button is depressed, it changes the value of a variable? Just change something like k = 'somestring' or some number, to 'someotherstring' or some other number.

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Jan 2017-3-27

It depends on where this variable is existing: Do you mean the base workspace, a diagram, a Simulink object, a function, a MAT file?

Marcus Blackburn 2017-3-27

A base workspace. Just change something like k = 'somestring' or some number, to 'someotherstring' or some other number.

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Answer 1

Nanda Gupta 2017-3-29

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I understand that you want to change the value of a variable in the base workspace when a button is pressed.

This can be done by using callback functions for the respective components, in this case a "push button". For example, after creating the uicontrol pushbutton, a callback function can be defined like:

function pushbutton1_Callback(hObject, eventdata, handles)
if(k == "somestring")
k = "someotherstring";

For more information regarding "callback functions", you can refer to:

http://www.mathworks.com/help/matlab/creating_guis/add-code-for-components-in-callbacks.html#f10-1001407

Also, the uicontrol components such as "pushbutton" can be created using the "uicontrol" function and an appropriate callback function can be associated with it using the "Callback" property. For more information regarding this, please refer: http://www.mathworks.com/help/matlab/ref/uicontrol.html