Dear Rene, sorry for being so ignorant - bring my deep apologies. Just as an excuse: I'd never guessed to search for a method filling the slices in Y inside 1D histogram class. May be I'm relying on my inuition too much, but intuitively Y-slice seems to be something which generic 1D hist doesn't have. This caused my confusion. Let me ask one question: may be it is a matter of me not being a very good designer, but do you think is it right for 1D histogram class to have methods like ProfileY(), even if they don't do anything? thanks, Pasha Rene Brun wrote: > > Dear Pasha, > > I am surprised by your question. Root supports ALL projections, bands, > slices facilities of Hbook and many more. Did you look at the TH1 specs > ? > You will find: > > virtual void FitSlicesX(TF1 *f1=0,Int_t binmin=1, Int_t > binmax=0, > Int_t cut=0 ,Option_t *option="QNR"); > virtual void FitSlicesY(TF1 *f1=0,Int_t binmin=1, Int_t > binmax=0, > Int_t cut=0 ,Option_t *option="QNR"); > virtual void FitSlicesZ(TF1 *f1=0,Int_t binminx=1, Int_t > binmaxx=0, > Int_t binminy=1, Int_t binmaxy=0, > Int_t cut=0 ,Option_t *option="QNR"); > virtual Stat_t Integral(); > virtual Stat_t Integral(Int_t binx1, Int_t binx2); > virtual Stat_t Integral(Int_t binx1, Int_t binx2, Int_t biny1, > Int_t biny2); > virtual Stat_t Integral(Int_t binx1, Int_t binx2, Int_t biny1, > Int_t biny2, Int_t binz1, Int_t binz2); > TProfile *ProfileX(const char *name="_pfx", Int_t > firstybin=0, > Int_t lastybin=9999, Option_t *option=""); > TProfile *ProfileY(const char *name="_pfy", Int_t > firstxbin=0, > Int_t lastxbin=9999, Option_t *option=""); > TH1D *ProjectionX(const char *name="_px", Int_t > firstybin=0, Int_t lastybin=9999, > Option_t *option=""); > TH1D *ProjectionY(const char *name="_py", Int_t > firstxbin=0, Int_t lastxbin=9999, > Option_t *option=""); > TH1D *ProjectionZ(const char *name="_pz", Int_t > firstxbin=0, Int_t lastxbin=9999, > Int_t firstybin=0, > Int_t lastybin=9999, Option_t > *option=""); > TH1 *Project3D(Option_t *option="x"); > > In addition, the Root functions work from an existing 2-d or 3-d > histograms. > No need to prebook the projections, slices, etc as it was the case for > Hbook. > > Rene Brun > Pasha Murat (630)840-8237@169G wrote: > > > > Hi Rooters, > > > > in old good days of HBOOK 2D histograms had a set of nice facilities of > > slices, banks and projections which were extremely handy for analysis. > > I'm thinking if it is worth having the equivalent functionality in ROOT > > classes - it is certainly true that everybody can easily implement such > > macros for himself, but wouldn't it be nice to have a common set of such > > utilities ? > > thanks, Pasha
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