Hi Stefan, I cannot reproduce your problem. Could you send me your file framework.root as an attachment. I will investigate. Rene Brun stefan kluth wrote: > > Hi, > > I have a tree with dynamic arrays of floats as branches and a basic float > branch. I would like to plot a simple expression involving a dynamic > array, but it doesn't work. Here is an example root session: > > ******************************************* > * * > * W E L C O M E to R O O T * > * * > * Version 2.00/10 30 July 1998 * > * * > * You are welcome to visit our Web site * > * http://root.cern.ch * > * * > ******************************************* > > CINT/ROOT C/C++ Interpreter version 5.13.66, July 24 1998 > Type ? for help. Commands must be C++ statements. > Enclose multiple statements between { }. > root [0] TFile f1("framework.root"); > root [1] ntp1->Print(); > ****************************************************************************** > *Tree :ntp1 : yflips > * > *Entries : 100 : Total Size = 44566 bytes File Size = > 44566 * > * : : Tree compression factor = 1.00 > * > ****************************************************************************** > *Branch :ievent : ievent/I > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :sume : sume/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :njets : njets/I > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :JE0yf : JE0yf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :Pyf : Pyf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :P0yf : P0yf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :Eyf : Eyf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :Dyf : Dyf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :Gyf : Gyf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :Lyf : Lyf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > *Branch :E0yf : E0yf[njets]/F > * > *Entries : 100 : Total Size = 0 bytes File Size = > 0 * > *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00 > * > *............................................................................* > root [2] ntp1->Draw("njets/sume"); > Warning in <MakeDefCanvas>: creating a default canvas with name c1 > root [3] ntp1->Draw("Lyf[1]/sume"); > > Error: No symbol ntp1->Draw("Lyf[1]/sume") in current scope > FILE:/tmp/faaaazuca LINE:1 > *** Interpreter error recovered *** > root [5] ntp1->Draw("njets/sume"); > Error: No symbol ntp1->Draw("njets/sume") in current scope > FILE:/tmp/gaaaazuca LINE:1 > *** Interpreter error recovered *** > > The first command "ntp1->Draw("njets/sume");" works as expected. The > second command "ntp1->Draw("Lyf[1]/sume");" cocks up the interpreter, such > that even the first command does not work anymore. > > Any ideas? cheers, Stefan > > ---Stefan Kluth---------------Lynen Fellow----------------|\--|\------- > - LBNL, MS 50A 2160 - phone: +1 510 495 2376 - |/ |/ - > - 1 Cyclotron Rd. - fax: +1 510 495 2957 - |\/\|\/\|' - > ---Berkeley, CA94720, USA-----e-mail: SKluth@lbl.gov------|/\/|/\/|----
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