[ROOT] how to cut based on an user function

From: Luiz Martins Mundim Filho (mundim@uerj.br)
Date: Wed Sep 05 2001 - 03:30:41 MEST 

Hello

First of all, sorry if this question is too trivial...

I need to plot several variables using several cuts. One of these cuts
is not a trivial one, but I need to search an array and depending on the
value of one of its elements, reject the event. This cannot be done on
the Draw command, one needs to write a C function to do it. Some one can
tell me how can I do that and use it on the Draw command? Lets call this
function ngamma.C. What I need is something like the following:

root> h1->Draw("var",cut1&&cut2&&...&&ngamma==0)

I have written a whole analysis program, using h1->MakeSelector, but I
need to draw several variables to test (and look for) new cuts and it
has been hard and slow to do that using h1->Process("h1.C").

Thanks in advance.

Luiz

This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:59 MET