Get latest value from workspace variable in callback

I am coding my own gui. I could not understand how to get the control I wanted from guide. In my coding: I think I declared a global variable (such as myvar) and gave it an initial value. I started a script and declared a variable, then moved to a function file.

I changed the value via a callback from one uicontrol. The value for the variable changes in the workspace. I use a pushbutton gui to save the information, 'Callback', {@gsave, myvar} but the function gsave(hObject, eventdata, myvar) grabs the initial value of myvar and not the latest. How do I refresh the definition? (Thanks for any input.)

[Jan]

We cannot find the mistake in your code, if you do not post it here.

Answer 1

[Paulo Silva]

1- Avoid using global variables, there are several better ways to share data, use arguments to share data or in your case (the title message) you can use myvar = evalin('base', 'myvar') to get the workspace value of myvar into your gui functions.

2- When declaring global variables you must declare them global in all the functions you want to use them

fun1()
global myvar
end

fun2()
global myvar
end

[Tony]

Thanks, I need to investigate evalin(). I also edited my question, because I am concerned that I mis-spoke when I said that I declared a global variable.

[Paulo Silva]

send the data to other function in other files using their arguments, it's the best way

function mygui

myvar=1;

OtherFunctionOnOtherFile(myvar)

end

[Paulo Silva]

Inside the GUI share the data using the handles structure.

[Tony]

The evalin() function is exactly what I need.

(If there is a similar function to write to the base, I will be able to make some of my coding work with less lines).

Thanks

[Paulo Silva]

assignin('base', 'myvar', myvar)