How to reset variables in MATLAB GUI?

I am developing a MATLAB GUI using app designer. I want to create a button which deletes specific variables. The variables are initially set using the setappdata function.

[Adam]

If you are using appdesigner why use setappdata? An appdesigner GUI is based on a class which is a natural place to store all the data you need and is accessible in every function of the GUI class.

[Tara Prasad Mishra]

Hi Adam, In the MATLAB app designer, I used a push button to load an image and now another push button to perform some operations on the image. If I do not use setappdata and getappdata, there is an error in the operation push button indicating undefined function image. (I do not want to define the image as a global variable due to further complications associated with it). Thank you.

[Image Analyst]

Hard, or impossible, to say without seeing your code.

[Adam]

I've only really used appdesigner once, but apart from its annoying way of not allowing you to edit parts of the code it creates it is just based on a class whose entire purpose is to share data between its functions.

Show the code that you have, as Image Analyst says, to enable people to be more help.

Answer 1

[Jan]

It depends on what "delete" means.

You do not create variables by the setappdata command, but this function stores the contents of the variables in the ApplicationData of a GUI element. Afterwards you can remove the entry by rmappdata, as mentioned in the documentation of setappdata.