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Thanks for clarification, Hendrik.
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<div>Now I realise, that this was already discussed in the forum before.</div>
<div>Cheers</div>
<div>Hannes</div>
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<div>On 31.08.2012, at 01:32, Hendrik Hoeth wrote:</div>
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<div>Hi Hannes,<br>
<br>
<blockquote type="cite">I thought, if I do not call the "normalize" procedure at the end, the<br>
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<blockquote type="cite">histos would not be normalized to bin widths, but it seems they still<br>
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<blockquote type="cite">are. Is this correct ?<br>
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That's correct. This is why we call it a histogram, not a bar chart,<br>
since histograms are invariant under changes of the binning. I know that<br>
this concept hasn't reached the ROOT developers yet ...<br>
<br>
<blockquote type="cite">And if yes, is there a easy way to obtain a histo without<br>
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<blockquote type="cite">normalization to bin width ?<br>
</blockquote>
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Either fill the histogram with the bin width as additional weight (e.g.<br>
for histograms with variable binning) or scale the histogram in<br>
finalize() with the bin width (in case of equal bin sizes).<br>
<br>
Cheers,<br>
<br>
Hendrik<br>
<br>
-- <br>
Journalist: "Can you explain 5 sigma as 99.999something percent?"<br>
Fabiola G.: "Sure, that's 3*10^-7."<br>
(after the CERN Higgs seminar, 4 July 2012)<br>
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