Re: [ROOT] Kolmogorov Test

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Sep 06 2002 - 17:24:13 MEST


Hi Angela,

TH1::KolmogorovTest cannot work for TProfile. A proper
TProfile::KolmogorovTest function should be implemented.
I dont't think that simply using GetBinEntries instead of
GetBinContent is the right solution. Comments on this are welcome.

Rene Brun

On Tue, 27 Aug 2002, Angela Wyatt wrote:

> Hi,
> 
> I was wondering if it was possible to use the KS test for a profile
> histogram?  I looked at the TH1::KolmogorovTest, but this uses the sum of
> the BinContents rather than the BinEntries for the number of events.
> 
> Also, when looking at 1d histograms, I get warning messages:
> Warning in <TH1F::KolmogorovTest>: Weighted events and no Sumw2,
> I think, from histograms that have under/overflows and so the number of 
> entries doesn't equal the sum of the bin contents (I'm not using the U/0
> option). It doesn't make any difference - but I test 1000's of histograms.
> 
> Thanks,
>   Angela.
> 
> 
> 



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