how do i check if line in plot exists and if yes delete it otherwise nothing

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Jakub
Jakub 2012-11-6
回答： Sonima 2019-1-24
I have GUI with some plots. and in the plot there migt be lines in it. and when i pres certain button i want to check if there are some lines in plot and if so delete them. if there arent any do nothing... Thanks for help!

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采纳的回答

Arthur
Arthur 2012-11-6
Dirty way:
cla(axes_handle)
If you know the handle of the line:
if ishandle(line_handle)
delete(line_handle)
end
if you don't know the line handle, use get(axeshandle,'Children') to find it.

更多回答（1 个）

Sonima
Sonima 2019-1-24
Hi!
I want to do the same, delete a line if exist in a plot in a fuction.
I used the suggeste code
if ishandle(line_handle)
delete(line_handle)
end
But I got the error:
Undefined function or variable 'line_handle'.
How can I fix it?!

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