having an issue in App Designer clearing plots

Question

J. Webster 2016-4-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/278849-having-an-issue-in-app-designer-clearing-plots

评论： Matthew Ward 2021-1-14

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');

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mike Garrity 2016-4-13

7
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/278849-having-an-issue-in-app-designer-clearing-plots#answer_217782

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)