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app designer - how to add multiple x-axes on top and bottom of uiaxes

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Sveta Golod
Sveta Golod on 18 May 2020
Commented: Sveta Golod on 24 Mar 2021
I want to display a plot in appdesigner with multiple x-axes and y axes.
I have a GUI with axes object. I succeeded to add second Y axis by using:
yyaxis(app.UIAxes,'right')
plot(app.UIAxes,.....)
But I can't figure out how to add second x axes.
by using:
ax2 = axes('Position',app.UIAxes.Position,'XAxisLocation','top','YAxisLocation','right','Color','none');
plot(ax2,Iout,yout,'o-r','Parent',ax2)
But it doesn't work, it creates a new figure outside the GUI instead.
  2 Comments
Sveta Golod
Sveta Golod on 24 Mar 2021
Finally in my application I used just one x-axes, and it was good enough for me.
So I don't have a code to share... sorry

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Accepted Answer

Sveta Golod
Sveta Golod on 19 Jul 2020
I got an MathWorks response:
From what I understand, you would like to display multiple x-axes in a "uifigure" component created in App Designer. Please let me know if my understanding is incorrect.
Unfortunately, this is not possible with the "uiaxes" component.
However, one possible workaround for this issue is to use regular axes objects in an App Designer application instead of using the default UIAxes objects. The regular axes objects cannot be added to the App Designer application with the drag and drop interface in the "Design View", but they can be added to a UIFigure programatically.
To achieve this workflow, a startup function for the UIFigure could be added to the App Designer application. Within this startup function, two new axes objects could be created, with the parent of the axes set to be the UIFigure. I have included a snippet of code to demonstrate this workflow within the startup function.
function startupFcn(app)
app.ax1 = axes(app.UIFigure)
app.ax2 = axes(app.UIFigure)
% Do additional processing to add plots to the axes, change positioning, etc.
end
Once these axes objects are created, you can perform the necessary manipulations of setting the positions, adjusting the axes locations, changing the background colors, etc.
  2 Comments
jonas
jonas on 12 Oct 2020
I guess ax1 and ax2 are global properties, so if you want to save the handles in app.x then you need to define them first
properties (Access = public)
ax1
ax2
end

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