Brush data returns empty 0x0 ogical

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Feri
Feri 2020-2-29
评论： Feri 2020-3-3
Hello,
I have been looking around to find a way to automatically save the brushed data, but am stuck at the first step.
Using the following lines:
% find all objects with the property BrushData
hB = findobj(gcf,'-property','BrushData');
% extract the brush data
data = get(hB,'BrushData');
What I receive is an empty logical output.
Does anyone know how to solve this? I can't use the function in FileExchange "selectdata".
Or any suggestion on how to automatically save the brushed data and exit the brush mode in the current axes?
Thank you in advance.

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采纳的回答

Divya Gaddipati
Divya Gaddipati 2020-3-3
You can refer to the following snippet and modify it according to your need:
x = rand(20,1);
y = rand(20,1);
Handle = scatter(x,y);
b = brush;
b.Enable = 'on';
After selecting the data, you can get the brushed data using the get command
xd = get(Handle, 'XData');
yd = get(Handle, 'YData');
brush = get(Handle, 'BrushData');
brushed_data_x = xd(logical(brush));
brushed_data_y = yd(logical(brush));
b.Enable = 'off';
Hope this helps!
  1 个评论
Feri
Feri 2020-3-3
Excellent, thank you so much.
The way it worked for me was that I had to put a break point, brush the data, the run the rest of the code to collect coordinates. Is the a way that I can do this without the breakpoint? Because I have to implemet this into a GUI.
Thanks a million.

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