MATLAB: Brush data returns empty 0x0 ogical

brushinteractive data selection

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.

Best Answer

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!
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