Step plot app designer

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Victor Castro Campos
回答： Rahul 2024-9-4
How Can I plot a step function in app designer? When I use UIAxes gives me an error.
  2 个评论
Adam Danz
Adam Danz 2020-8-23
The full error message would tell us what's wrong.
Knowing how you're plotting the step function would also be helpful.
Pierre-Olivier Desrosiers
Pierre-Olivier Desrosiers 2022-10-4
Hi Victor, if you're using a simulink model, you can just add a To Workspace block, sim() your model, then you will have access to your step function values. Also, about the UIAxes, that's what you'll need to write :
plot(app.Name_of_your_Uiaxes(UIAxes by default), x_value, y_value);
Hope that helps.

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回答（1 个）

Rahul
Rahul 2024-9-4
Hi @Victor Castro Campos,
I understand that you are trying to plot a step function in app designer using 'UIAxes' component of app designer.
To achieve the desired result you can follow the following steps:
  • Add a 'UIAxes' component to the 'UIFigure' of the app
  • Add a push Button component to the 'UIFigure'
  • Add a 'ButtonPushed' callback on this Button.
  • In the 'ButtonPushed' callback of the added button add the folloing code
x = 0:5;
y = [0, 1, 1, 2, 2, 3];
stairs(app.UIAxes,x,y)
% You can change x and y according to your use-case change the name of your
% app in the 'stairs' functions
In the above mentioned case you are needed to add a push Button and it's callback.
If that is not desirable, then a possible workaround can be
  • Export the app as a '.m' file
  • Open the exported '.m' file
  • Add the step function code mentioned above in 'createComponents' function after setting the position of the 'UIAxes'
  • Run the app from MATLAB editor
  • You will get the plotted step function on the 'UIAxes' directly after running the app.
Hope this helps! Thanks.

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