MATLAB: How to transfer variables between GUIs?

guisetappdata

I am facing a problem with the transfer of variables between the GUIs. I have used the matlab function 'getappdata' to store the variables and 'setappdata' to load the variable in another GUI. But I am getting an error message as " Error using setappdata Too many output arguments." I am not able to solve this issue. Kindly help me.

Best Answer

"I have used the matlab function 'getappdata' to store the variables and 'setappdata' to load the variable in another GUI"

It looks like you have used the exactly the wrong way round: setappdata is for storing data in a graphics object, getappdata is for getting it back out again:

setappdata(obj,'name',val)
val = getappdata(obj,'name')

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MATLAB: Appdesigner: Using a app’s method from another app

This can be done one of several ways.

1. You can load one app into another app as a variable, and access its methods that way. You can see an example of loading an app into another app in this example:

https://www.mathworks.com/help/matlab/creating_guis/creating-multiwindow-apps-in-app-designer.html

2. You can share application data using the 'setappdata' and 'getappdata' functions. You can refer to the documentation for how to use these functions:

https://www.mathworks.com/help/matlab/ref/setappdata.html

3. If neither of these suffice, you can always save a method handle to the base workspace with the 'assignin' function and use it from there. You can refer to the documentation for this function here:

https://www.mathworks.com/help/matlab/ref/assignin.html

MATLAB: Passing variables between GUI’s and invalid object or handle

The setappdata function also accepts uifigure handles, so you need to use that as input:

app=struct('self',uifigure);
%%

setappdata(app.self,'data',1)
%%
getappdata(app.self,'data')

Best Answer

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MATLAB: Appdesigner: Using a app’s method from another app

MATLAB: Passing variables between GUI’s and invalid object or handle

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