Re: [ROOT] Chaining files together

From: Stilianos Kesisoglou (kesisogl@fnal.gov)
Date: Sat Sep 07 2002 - 01:54:21 MEST 

Hi Philip,

    The [i] doesn't work because ROOT expects a string argument in the method run1.Add(),
and in contrast to all the shell languages it doesn't have a parser to make substitutions before it handles
the string to the Add method.

    So you have to construct the string outside the method call using C++ commands, and then hand it to Add().

    Try the following:

     TChain run1("h45");

    char name[200];
    for (Int_t i=1; i<13, i++) 
    {
        sprintf(name,"/nfs/farm/babar/AWG11/Charmonium/Etac/ntp13/good_1999-b1-s0-r10B-on_all_[%i].root",i);
        run1.Add(name);
    }

    for (Int_t i=1; i<58, i++) 
    {
        sprintf(name, "/nfs/farm/babar/AWG11/Charmonium/Etac/ntp13/good_2000-b1-s0-r10B-on_all_[%i].root",i);
        run1.Add(name); 
    }

Stelios.

----- Original Message ----- 
From: "Philip Clark" <pclark@SLAC.stanford.edu>
To: <roottalk@pcroot.cern.ch>
Sent: Friday, September 06, 2002 6:26 PM
Subject: [ROOT] Chaining files together


> 
> Hi Everyone,
> 
> Currently, I am trying to loop over files and make chains. In PAW I would do:-
> 
>  MACRO run1
>    do i=1,12
>      chain run1 good_1999-b1-s0-r10B-on_all_[i].hbook
>    enddo
>    do i=1,57
>      chain run1 good_2000-b1-s0-r10B-on_all_[i].hbook
>    enddo
> etc
> 
> I root I am trying to do something like 
> 
> TChain run1("h45");
> for (Int_t i=1; i<13, i++) 
> {
>   run1.Add("/nfs/farm/babar/AWG11/Charmonium/Etac/ntp13/good_1999-b1-s0-r10B-on_all_[i].root");
> }
> for (Int_t i=1; i<58, i++) 
> {
>   run1.Add("/nfs/farm/babar/AWG11/Charmonium/Etac/ntp13/good_2000-b1-s0-r10B-on_all_[i].root");
> }
> 
> Obviously [i] wont work here... Any ideas instead? I need to loop over
> several thousand files in this manner. So a better solution would help a
> lot.
> 
> Also a way to substitute the path
> /nfs/farm/babar/AWG11/Charmonium/Etac/ntp13/ 
> which is the same all the time would be good as well.
> 
> Thanks
> 
> -Phil
> 
> -- 
> Philip J. Clark                    MS41 (Bristol), SLAC 
> tel: 1-650-926-3761                Stanford University
> fax: 1-650-926-3767                P.O. Box 20450
> pclark@slac.stanford.edu           Stanford, California 94309
>

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