Change Variable Value in a Script through App Designer GUI

2019 3 6
0 个回答
更新时间：2019 3 12
4 次查看（30 天）

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Hi, I have a GUI made with App Designer where depending on the option selected from a drop down menu, a particular script will run when a button called 'START' is pressed. I also have several 'Edit Field (Numeric)' where I would want to edit the value of a variable from the GUI. So my issue is how do I change the variable value that is assigned in the script through the GUI's Edit Field.
m.JPG
function STARTButtonPushed(app, event)
if (strcmp(app.SelectTechniqueDropDown.Value,'Option1')
run('script1.m')
elseif (strcmp(app.SelectTechniqueDropDown.Value,'Option2')
run('script2.m')
elseif (strcmp(app.SelectTechniqueDropDown.Value, 'Option3')
run('script3.m')
end

9 个评论
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Dennis
Dennis 2019-3-6
Is there a good reason that you are using scripts instead of functions?
Nick M.
Nick M. 2019-3-7
Not really, would it be easier to do it with functions?
Dennis
Dennis 2019-3-7
Yes, you could pass the variable as function input.
Nick M.
Nick M. 2019-3-7
编辑：Nick M. 2019-3-7
Do you have a simple example code on how to do this between an external function and the app designer numeric fields?
Dennis
Dennis 2019-3-8
Create a simple app with 1 pushbutton and 1 numeric edit field.
The callback of the pushbutton should look like this:
function ButtonPushed(app, event)
MyFcn(app.EditField.Value) %check the name of your EditField if you have more than 1
end
The function can look like this (needs to be on search path):
function MyFcn(MyValue)
disp(MyValue)
end
Nick M.
Nick M. 2019-3-9
It works and thanks for all the help Dennis!!. Also by chance do you know how to allow a user to input a matrix into an edit field?
Dennis
Dennis 2019-3-11
Which size/format does the matrix have? It might be easier to import the matrix from a file.
Nick M.
Nick M. 2019-3-12
Its either a 4x4 matrix in this form for example:
[1 0 0 0;
0 1 0 0;
0 0 1 0;
0 0 0 1]
or a 4x1 matrix in this form for example:
[1;1;1;0]
Stephen23
Stephen23 2019-3-12
编辑：Stephen23 2019-3-12
"...how to allow a user to input a matrix into an edit field?"
Rather than using an edit field, it would be simpler to use a uitable:
https://www.mathworks.com/help/matlab/ref/uitable.html

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Nick M.
Nick M.
2019-3-6

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Stephen23
Stephen23
2019-3-12

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