[d2n-analysis-talk] ROOT TH2D Fit Trouble: S1 Timewalk

David Flay flay at jlab.org
Tue Mar 23 10:39:48 EDT 2010


On Tue, Mar 23, 2010 at 9:36 AM, Diana Parno <dparno at cmu.edu> wrote:

>
> > In PAW there was an 'hslice' and 'vslice' command that helped
> > streamline
> > the process.  I'm sure ROOT's T2D histo class has something similar.
>
> The ROOT equivalents to hslice and vslice are TH2::ProjectionX and
> TH2::ProjectionY, which give you 1-d histograms. You can also try
> TH2::ProfileX and TH2::ProfileY, which give you profile histograms.
>

Thanks!  I'll take a shot with this... I've noticed the current TDC vs.
1/sqrt(ADC) has a <slight> slope to it, I'll see if I can fix it up.

-- 
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David Flay
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