having an issue in App Designer clearing plots

In the application I'm developing, and I'd like to make it so that the data that is plotted will be based on which checkboxes are checked. The block of code that does this is below. My problem is that the clf doesn't clear the figure. Each time this code runs, then I get a new set of data plotted on top of the old set of data.

Am I doing something wrong?

             clf(app.UIAxesDay);
             hold(app.UIAxesDay, 'on');
                  if app.CheckBoxMPFV.Value
                      plot(app.UIAxesDay, walknum, mpfv,'-o' );
                  end
                  if app.CheckBoxMST.Value
                      plot(app.UIAxesDay, walknum, mst, '-o' );
                  end
                  if app.CheckBoxMSD.Value
                      plot(app.UIAxesDay, walknum, msd, '-o' );
                  end
                  ylim(app.UIAxesDay, [0 7]);
             hold(app.UIAxesDay, 'off');

Answer 1

[Mike Garrity]

Well, clf probably isn't what you want anyways. It's job is to remove everything from a figure, and it sounds like you have checkboxes in the figure. It would also delete the axes that you've named UIAxesDay, and you'd need to create a new one.

I think that what you probably want is cla. It's job is to remove everything from an axes. You'd use it like this:

cla(app.UIAxesDay)

[J. Webster]

Yep, that worked. Bit confused though, since cla isn't listed as a supported function in the app designer graphics

supported graphics functions

[Kristin Schall - van Bellen]

What can you do, if cla is not working?

[Matthew Ward]

app.UIAxes.cla works for me, but does not clear patch objects.