Deleting data from a graphics

Question

ali veli 2019-4-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457100-deleting-data-from-a-graphics

评论： ali veli 2019-4-18

采纳的回答： KSSV

Hi all,

I have two variables,x and y.

There are 100 data in these variables,plotting graphics with plot function

After manually deleting some data in the chart, the number of data automatically decreases to 100 in x and y.

How can I save the current data back to the workspace section after deleting it?

Thank you

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Rik 2019-4-18

I am not aware you can delete points that way, but the XData and YData properties of the line object (which is returned by the plot function) should contain your data.

ali veli 2019-4-18

select data from the graph and press del to manually delete

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Answer 1

KSSV 2019-4-18

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457100-deleting-data-from-a-graphics#answer_371168

x = rand(10,1) ;  y = rand(10,1) ; 
figure
hold on
for i = 1:10 
    h = plot(x(i),y(i),'.r') ; 
end
title('delete some poits and press any key')
pause
%% Get data 
a = get(gca,'Children');
xdata = get(a, 'XData');
ydata = get(a, 'YData');
zdata = get(a, 'ZData');
xdata = cell2mat(xdata)  ; 
ydata = cell2mat(ydata)  ; 
plot(xdata,ydata,'Ob')