Phillipe, Thanks - I did not realize that I had NaN's in my ntuple. The curious thing is that nt->Draw("yd:y"), etc.. gave no problem. Ed > -----Original Message----- > From: Philippe Canal [mailto:pcanal@fnal.gov] > Sent: Thursday, September 05, 2002 4:59 PM > To: Ed Oltman; Roottalk@Pcroot. Cern. Ch > Subject: RE: [ROOT] Strange ntupe behavior. > > > Hi Ed, > > The problem appears only on Windows because of their choice for the result > of operator> and operator< when applied to numerical NaN. Your > file indeed > has some Nan: > > root [7] nt->Scan("yd","yd<-30") > ************************ > * Row * yd * > ************************ > * 28482 * -1.#IND * > * 28490 * -1.#IND * > * 28520 * -1.#IND * > * 28534 * -1.#IND * > * 28540 * -1.#IND * > * 28541 * -1.#IND * > * 28589 * -1.#IND * > * 28622 * -1.#IND * > * 28631 * -1.#IND * > * 28640 * -1.#IND * > * 28681 * -1.#IND * > * 28700 * -1.#IND * > * 28730 * -1.#IND * > * 28733 * -1.#IND * > ************************ > > Somehow this is not a problem on Linux where comparaison to Nan are always > false. While it is a problem on Windows where the comparaison are > sometimes > true, sometimes false. Hence on Linux the Nan always appear as > underflow or > overflow, while on Windows they are being used to try to > determine the range > of the histogram. > > Cheers, > Philippe. > > -----Original Message----- > From: owner-roottalk@pcroot.cern.ch > [mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Ed Oltman > Sent: Thursday, September 05, 2002 1:58 PM > To: Roottalk@Pcroot. Cern. Ch > Subject: [ROOT] Strange ntupe behavior. > > > Hello, > I have a root file with a single ntuple created with: > > TFile *f = new TFile("test.root","RECREATE"); > TNtuple *nt = new TNtuple("nt","ff","x:y:z:xd:yd:zd:s"); > . > . > for(int i=0;i<totInShell;i++) > { > . > . > nt->Fill((x,y,z,xd,yd,zd,s); > } > f->Write(); > f->Close(); > > I would be happy to send the root file - its 339 kBytes. The file is > generated with a standalone application (Win2K + VC6.0) > > I then open the ntuple in a normal root session: > > TFile *f = new TFile("test.root") > > At the bottom of this not is result of nt->Print() > > Here's the problem: I can display any single branch with > nt->Draw() EXCEPT > xd and yd. IF I try these, root consumes all my cpu until I type ctrl-C. > However, I can do > > nt->Draw("xd:x") or nt->Draw("yd:xd") etc... > > The only failures I have are nt->Draw("xd") and nt->Draw("yd"). Same > failure occurs if I use a TBrowser object to inspect the ntuple. > > Note: I can create a 1D histogram and project xd onto it > > TH1F *pxd = new TH1F("pxd","xd",100,-25.,25.) > nt->Project("pxd","xd"); > pxd->Draw() > > and it works fine. I have the problem in both 3.02/7 and 3.03/8. > (stand-alone application linked with same version as root.exe) > > Any ideas what might be wrong? > > Thanks, > Ed Oltman > > > here is nt->Print() > > ****************************************************************** > ********** > ** > *Tree :nt : ff > * > *Entries : 30664 : Total = 748011 bytes File Size = > 331425 > * > * : : Tree compression factor = 2.63 > * > ****************************************************************** > ********** > ** > *Br 0 :x : > * > *Entries : 30664 : Total Size= 95994 bytes File Size = > 40248 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 2.39 > * > *................................................................. > .......... > .* > *Br 1 :y : > * > *Entries : 30664 : Total Size= 95994 bytes File Size = > 41533 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 2.31 > * > *................................................................. > .......... > .* > *Br 2 :z : > * > *Entries : 30664 : Total Size= 95994 bytes File Size = > 31161 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 3.08 > * > *................................................................. > .......... > .* > *Br 3 :xd : > * > *Entries : 30664 : Total Size= 95997 bytes File Size = > 55843 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 1.72 > * > *................................................................. > .......... > .* > *Br 4 :yd : > * > *Entries : 30664 : Total Size= 95997 bytes File Size = > 55933 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 1.72 > * > *................................................................. > .......... > .* > *Br 5 :zd : > * > *Entries : 30664 : Total Size= 95997 bytes File Size = > 30069 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 3.19 > * > *................................................................. > .......... > .* > *Br 6 :s : > * > *Entries : 30664 : Total Size= 95994 bytes File Size = > 594 > * > *Baskets : 3 : Basket Size= 32000 bytes Compression= 161.61 > * > > > > > >
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