Re: Using constants in Draw selection

From: Christian Bormann (bormann@hpikf3.ikf.physik.uni-frankfurt.de)
Date: Fri Apr 11 1997 - 22:22:24 MEST

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On Fri, 11 Apr 1997, Ivan So wrote:

> A useful construct in using Draw is:
> 
> ntuple->Draw("z:x:y","z < maxz && z > minz", ...)
> 
> where maxz and minz are general constants computed in an interactive root
> session. The maxz and minz may depend on the data in ntuple and
> other functions.
> 
> How can we accomplish this with all our data in ntuple?
> 
> Ivan
> so@bnl.gov
>  
> 

You can do it this way:

Char_t Cuts[80];

Float_t maxz = ntuple->GetMaximum("z") - 50; 
Float_t minz = ntuple->GetMinimum("z") + 50;

sprintf(Cuts,"z < %f && z > %f", maxz, minz);
ntuple->Draw("z:x:y",Cuts);


Christian
   
---
Christian Bormann 
bormann@ikf.uni-frankfurt.de

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