Jaroslav Bielcik wrote:
>
> Hello rooters
>
> I wanted to use graphical cut as I understand it in a common sense, it
> means to choose points of histogram inside graphicaly defined polygone.
> But you claim that it is not implemented (in roottalk).
>
> Can you help me to understand what in that case is TCutG doing if I
> put it as the selection in Draw function in 2dim histogram.
>
> E.g.:
> T.Draw("x:y") will give me 2dim histogram
>
> I make cutg1 polygone on this 2dim histogram and
>
> T.Draw("x:y","cutg1") gives me something but I do not know what really.
>
> With best regards
>
> Jaroslav Bielcik
> GSI Darmstadt
The use of the class TCutG is explained at:
http://root.cern.ch/root/html/TCutG.html
Note, however, that the current implementation has a bug
when using the operator ! on a TCutG object. This problem
will be fixed in 2.21.
Rene Brun
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