Passing a matrix between several callbacks

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Luke
Luke 2023-1-25
编辑： Bjorn Gustavsson 2023-1-25
Im trying to write a program that analyses a matrix, I want to be able to have a button that opens and imports the matrix, which I do have and works great, then other buttons that perform different operations on that matrix. This is a problem as when I try to access the matrix variable from other callbacks the error Undefined Variable pops up. What is the best way that I can store a matrix for use in other callbacks?

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Bjorn Gustavsson
Bjorn Gustavsson 2023-1-25
编辑：Bjorn Gustavsson 2023-1-25
If you have all your user interface in one figure (some calculator-like programme), then one way to store the matrix is in the 'UserData' of the figure. For example:
set(gcf,'Userdata',pi*sqrt(2))
var_val = get(gcf,'UserData');
That way all UI-elements of the figure ought to have access to the matrix. If you want to do some more fancy calculator-emulation (HP15C for the win in all weathers!) you could have more complicated structures (a stack for example) in there.
HTH

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