Re: [ROOT] binning in TTree::Draw

From: Rene Brun (Rene.Brun@cern.ch)
Date: Mon Aug 28 2000 - 19:10:17 MEST

Next message: Rene Brun: "Re: [ROOT] TDirectory::mkdir"
Previous message: Rene Brun: "Re: [ROOT] help"
In reply to: Steve Udriot: "[ROOT] binning in TTree::Draw"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi Steve,
You can something like:

 TH1F *myhist = new TH1F("myhist","title",Nbins,Xlow,Xup);
 tree->Draw("var>>myhist")

This will use the histogram definition of the pre-existing TH1F myhist.

Rene Brun

Steve Udriot wrote:
> 
> Hi rooters,
> 
> Does an option exist for manipulating the histogram binning while using
> TTree::Draw ?Something like : "Nbins:Xlow:Xup"...
> 
> Steve
> 
>   --------------------------------------------------------------------------------
> 
>   Steve Udriot <Steve.Udriot@CERN.ch>
>   Ph. D. Student
>   ETH Zurich
>   High Energy Physics
> 
>   Steve Udriot
>   Ph. D. Student                         <Steve.Udriot@CERN.ch>
>   ETH Zurich
>   High Energy Physics
>   CERN Division EP;CH-1211 Geneve 23;;;  Cellular: +41-79-276.43.47
>                                          Work: +41-22-767.17.71
>                                          Netscape Conference Address
>   Additional Information:
>   Last Name     Udriot
>   First Name    Steve
>   Version       2.1

Next message: Rene Brun: "Re: [ROOT] TDirectory::mkdir"
Previous message: Rene Brun: "Re: [ROOT] help"
In reply to: Steve Udriot: "[ROOT] binning in TTree::Draw"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:32 MET