Step plot app designer

How Can I plot a step function in app designer? When I use UIAxes gives me an error.

[Adam Danz]

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]

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.

Answer 1

[Rahul]

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.