Problem using polyval/polyfit in App Designer R2022b
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Florian
il 22 Ago 2023
Commentato: Florian
il 23 Ago 2023
Hello i want to display a set of Input Data and Plot it.
After that i want to use polyfit/polyval on that Data and plot it also.
Some how this does not work in my App using App Designer ( in normal Matlab skript it worked)
here is an example code of it:
I used some Editfield to get diffrent Inputs
properties (Access = private)
Property % Description
Data
Range
PolyNom
function1
end
% Callbacks that handle component events
methods (Access = private)
% Button pushed function: DisplayButton
function DisplayButtonPushed(app, event)
app.Data = [app.EditField.Value,app.EditField2.Value,app.EditField3.Value,app.EditField4.Value,app.EditField5.Value,app.EditField6.Value]
app.Range = 1:length(app.Data)
app.Range = app.Range';
plot(app.UIAxes, app.Data,'o')
hold(app.UIAxes);
end
% Button down function: UIAxes
function UIAxesButtonDown(app, event)
app.PolyNom = polyfit(app.Range,app.Data,2);
app.function1 = polyval(app.PolyNom, app.Range);
plot(app.UIAxes2, app.function1);
I watched some Videos and they basicly do the same and it works, is this maybe a Version problem?
Thank you!
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Daniele Sportillo
il 22 Ago 2023
Hi Florian,
are you using the Edit Filed (Numeric) Component, and not the Edit Field (Text), in your App?
Otherwise in app.Data you would be concatenating characters ['123456'] and not numbers [1,2,3,4,5,6].
Daniele
9 Commenti
Daniele Sportillo
il 22 Ago 2023
According to your code:
function UIAxesButtonDown(app, event)
app.PolyNom = polyfit(app.Range,app.Data,3);
app.function1 = polyval(app.PolyNom, app.Range);
plot(app.UIAxes, app.function1);
end
you are plotting the polyval when you click on the axes, not when you click on the second button (poly).
If you want to plot the polyval when you click on your button (poly) you have to add that code to the ***ButtonPushed callback for your button.
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