App Designer provides a tutorial that guides you through the process of creating a simple app containing a plot and a slider. The slider controls the amplitude of the plotted function. You can create this app by running the tutorial, or you can follow the tutorial steps listed below.
To run the tutorial in App Designer, select Open > Interactive Tutorial on the Designer tab in the App Designer toolstrip.
Perform the following steps in App Designer.
Drag an Axes component from the Component Library onto the canvas.
Drag a Slider component from the Component Library onto the canvas. Place it below the axes, as in the preceding image.
Replace the slider label text. Double-click the label and replace the word
Above the canvas, click Code View to edit the code. (Notice that you can switch back to edit your layout by clicking Design View.)
In the code view, add a callback function that executes MATLAB® commands whenever the user moves the slider. Right-click
app.AmplitudeSlider in the Component
Browser. Then select Callbacks > Add ValueChangedFcn callback in the context menu. App Designer creates a callback function
and places the cursor in the body of that function.
peaks function in the
axes. Add this command to the second line of the
plotcommand specifies the target axes (
app.UIAxes) as the first argument. The target axes is always required when you call the
plotcommand in App Designer.
Change the limits of the y-axis by setting the
YLim property of the
UIAxes object. Add this command to the third line of the
app.UIAxes.YLim = [-1000 1000];
YLimproperty. Always use the pattern
Propertyto access property values.
to save and run the app. After saving
your changes, your app is available for running again in App Designer, or by
typing its name (without the
.mlapp extension) at the
MATLAB command prompt. When you run the app from the command prompt,
the file must be in the current folder or on the MATLAB path.