how to delete an object in a plot using the delete button in keyboard

2013 3 26
1 个回答
回答已采纳
3 次查看（30 天）

0 个投票

Hi all,
I want to delete an object I created in a plot using the delete button. I created a GUI with a plot plotting a figure as described by the following:
t = 0:pi/5:2*pi;
figure
patch(sin(t),cos(t),'y')
axis equal
Now how should I delete it using the delete button?
Thanks
Viv

2 个评论
显示 无 隐藏 无

Mahdi
Mahdi 2013-3-26
What do you want to delete? Do you want to delete the whole plot? Close the figure?
Why do you want to use the delete button? Why not close, or alt+F4?
Vivekram
Vivekram 2013-3-26
Hi Mahdi, I want to delete the polygon object inside the plot and not the plot itself.
Thanks
Viv

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2013-3-26

0 个投票

Use the figure KeyPressFcn or WindowKeyPressFcn callback. Test the received key. If it is the delete character, then delete() the object handle.

8 个评论
显示 6更早的评论 隐藏 6更早的评论

Vivekram
Vivekram 2013-3-26
Hi Walter,
Can you please provide me with an example .
Thanks,
Viv
Vivekram
Vivekram 2013-3-26
Hi walter,
That is awesome. Thanks a lot.
Can I also one more thing. Say if I have two object in the plots, say two polygon. The above method that you described deletes everything but what if I had to delete only one of them?
Sorry to be persistent.
Regards Viv
Walter Roberson
Walter Roberson 2013-3-26
How do you want to distinguish which one you want to delete?
Vivekram
Vivekram 2013-3-26
say one of them is of larger diameter and a different colour. Or the other method I was thinking was assigning each object a name which is then added to a list box in the gui. When I click on the appropriate name to be deleted, I press the delete button and the corresponding object in the plot gets deleted. I assume this is what you are asking.
Walter Roberson
Walter Roberson 2013-3-26
It would be easier to do it "by name", by setting the Tag field of the patch() object to the name, and findobj(figurenumber, 'Tag', 'TagNameHere')

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by