Re: how to get mean of a variable in a Tree

Hi Luca,

  I would suggest this:

  TTree *data = ....

data->Draw("variable>>his");
TH1F *his = gDirectory->Get("his");
his->GetRMS();
his->GetMean();
etc....

Arne.

On 10/07/2009 12:48 AM, Luca Grandi wrote:
> Dear ROOT users,
>
> I am looking for a way to get mean, rms, min and max of a variable in
> a tree once applied some cuts on the events. Apart from plotting the
> distribution and extracting the info from the Stat box, is there a
> different way to do it?
> regards
>
> luca
>

-- 
  Arne Vandenbroucke,
  Stanford University
  Dept. of Radiology,
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