How to undo a plot for multiple times?

Question

Ali Y. 2015-8-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/233605-how-to-undo-a-plot-for-multiple-times

评论： Ali Y. 2015-8-13

I want to delete a scatter plot's items for multiple times. My code is like

 Function plot_callbacks (hObject, eventdata, handles)
figure (5)
scatter(x,y,'x')
hold on
scatitem = get(gca, 'Children');
handles.scatitem = scatitem;
guidata(hObject,handles)
Function undo_callbacks (hObject, eventdata, handles)
scatitem = handles.scatitem;
should_continue = true
while true
delete(scatitem(1))
scatitem(1) = []
should_continue = 0
end

In the second callback function, the line

delete(scatitem(1))

, just by it-self, deletes the last item, but just for one time. By the second function, I am trying to do the deletion for several times.

Does anyone know where did I write the code incorrectly? How can I make it working?

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Answer 1

Walter Roberson 2015-8-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/233605-how-to-undo-a-plot-for-multiple-times#answer_189178

编辑：Walter Roberson 2015-8-13

在 MATLAB Online 中打开

function undo_callbacks (hObject, eventdata, handles)
scatitem = handles.scatitem;
number_to_delete = 3;   %for example
delete(scatitem(1:number_to_delete))
scatitem(1:number_to_delete) = [];
handles.scatitem = scatitem;
guidata(hObject, handles);
end