At any point in an App Designer callback, you can just name the script to run the script.
function edit1_callback(whatever)
myscript;
end
See also http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F -- because the workspace when you call the script will be the workspace of the function.
Also, if you need any values set by the script inside the function, you should initialize the variables before you call the script.
function edit1_callback(whatever)
tf = []; %any value, just have to initialize it
myscript;
app.EditField3.Value = tf;
end
if you do not initialize the variables before you call the script, then MATLAB is permitted to assume that the variable tf refers to the tf function. ( tf is being used as an example here: the point is that you should initialize the names or else MATLAB is going to think that they refer to functions.)