Re: [ROOT] Convolution

From: Karl Hauschild (karlhaus@hep.saclay.cea.fr)
Date: Tue Jan 30 2001 - 11:11:35 MET


Dear Rene,

Maybe my mailer has screwed up, or I misunderstood, but I did
not receive the attatchment Spectrum.root or Peakdec1.C that
you mentioned. Could you post the mail aagin.

Many thanks,

Karl Hauschild
 
On Tue, 30 Jan 2001, Rene Brun wrote:

> Hi Roberto,
> 
> You may be interested to look at the class TSpectrum. See
> 
> http://root.cern.ch/root/htmldoc/TSpectrum.html
> 
> This class is based on an original implementation by Miroslav Morhac.
> References are given in this web page. In particular:
> 
>    M.Morhac et al.: Efficient one- and two-dimensional Gold         
>    deconvolution and its application to gamma-ray spectra                
>    decomposition. Nuclear Instruments and Methods in Physics             
>    Research A 401 (1997) 385-408.                                        
> 
> There are examples of deconvolutions that you can download from:
> 
> ftp://root.cern.ch/root/SpectrumDec.ps.gz
> 
> In the attachment you will find
>   - a macro example Peakdec1.C
>   - a file Spectrum.root used by the macro.
> 
> Rene Brun
> 
> 
> Roberto Catanuto wrote:
> > 
> > I need to make a convolution of aa landau of a landau with a gaussain and
> > then:
> > 
> >    * draw this function
> >    * fit a set of experimental data with this function
> > 
> > Pleas, note that i do not have an analytical expression of it since it is not
> > possible to  calculate the integral.
> > May you address me to some "root" capabilities to overcome this problem or
> > tell me who knows something about that?
> > Thanks a lot.
> > 
> > --
> > Roberto Catanuto
> > INFN, Milan
> > ITALY
> > 
> >
> 

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