Re: Wigner D-function in ROOT or C++?

Art,

I am curious to know the talk/article you are referring to ::) In ROOT we have the Breit-Wigner distributtion. See http://root.cern.ch/root/htmldoc/src/TMath.cxx.html#TMath:BreitWigner http://root.cern.ch/root/htmldoc/src/TRandom.cxx.html#TRandom:BreitWigner

see also:
http://root.cern.ch/root/roottalk/roottalk05/0954.html

Rene Brun

Snyder, Arthur E. wrote:
> Does anybody know where to find a implentation of Wigner D-functions that I can use in ROOT?
>
> I found a talk/article by Rene where they are mentioned but the implentation seems to be in
> the future.
>
> -Art S.
>
>
> -----Original Message-----
> From: owner-roottalk_at_pcroot.cern.ch on behalf of Fine, Valeri
> Sent: Sun 7/2/2006 6:56 PM
> To: nasim; roottalk_at_pcroot.cern.ch
> Subject: RE: [ROOT] geting the values stored in the histograms.
>
>
> You need either
> http://root.cern.ch/root/htmldoc/TH1.html#TH1:GetBinLowEdge
> or
> http://root.cern.ch/root/htmldoc/TH1.html#TH1:GetBinCenter
>
> Valeri
>
>> There are two ways:
>>
>> 1. Each concrete histogram class is derived from TArray class
>> http://root.cern.ch/root/htmldoc/TH1F.html
>> This means one can treat each histogram object as a plain array of
>> "float" number and use it as such. (For example method "[int]} returns
>> what you want)
>>
>> TH1F *histogram = new TH1F( some parameters);
>> TH1F &bins = *histogram;
>> for (int i=0; i< 100; i++)
>> printf(" Bin %i contains the value %f\n", i, bins[i]);
>>
>> 2. One can use the methods like TH1::GetBin<XXX>
>> , where XXX could be "Center", "Content", "Error" etc
>> see doc please
>> http://root.cern.ch/root/htmldoc/TH1.html#TH1:GetBinContent
>>
>>
>
>
>
>> Hope this helps.
>>
>> ----
>> Best regards
>> Valeri
>>
>>
>>
>>> -----Original Message-----
>>> From: owner-roottalk_at_pcroot.cern.ch
>>>
>> [mailto:owner-roottalk_at_pcroot.cern.ch] On
>>
>>> Behalf Of nasim
>>> Sent: Sunday, July 02, 2006 7:43 PM
>>> To: roottalk_at_pcroot.cern.ch
>>> Subject: [ROOT] geting the values stored in the histograms.
>>>
>>>
>>> Hi,
>>> If we have one dimensional histogram with 100 entries.
>>> Is it possible to extract the value of its x axis for each entry?
>>>
>>> Any help would be appreciated,
>>>
>>> Nasim
>>>
>>>
>>> --
>>>
>
>
>
>
>
>
>
Received on Mon Jul 03 2006 - 09:13:09 MEST