Hi Hajime, tree->Draw("aa[][]"); is not supported in this special case. but you can do: tree->Draw("a[0][]"); tree->Draw("a[1][]"); tree->Draw("a[2][]"); Rene Brun Hajime Nanjyo wrote: > > Dear ROOTers, > > I have a trouble concerning a variable size two dimensional array. > > I defined a class A with a member 'int *aa[3]; //[n]'. > (A mamber 'int n;' also included in the class A.) > A shared library was construced successfully for the ROOT I/O. > I could write or read a TTree in a TFile successfully > with the shared library but could not draw a histogram > with TTree::Draw("aa[][]") correctly in a ROOT interactive session. > > Please help me to solve the problem. > > By the way, I think it was useful if a syntax like > 'int (*aa)[3];//[n]' was supported in rootcint. > Is it possible? > > Best Regards, > Hajime > > P.S. > > I used the ROOT at /afs/cern.ch/sw/root/v4.00.06/rh73_gcc32/root > under Red Hat Linux 7.3 with gcc version 3.2. > > The simple code to illustrate the problem was attached. > Files listed below was included in it. > A.h,A.C,ALinkDef.h // for class A > write.C // to write class A to TFile > read.C // to read the TFile > make.sh // make shell scrip > run.C // for '.x run.C' in ROOT session > > The content of the file make.sh was as follows. > ////////////////////////////////////////////////////////////// > rootcint -f ADict.C -c A.h ALinkDef.h > > g++ -g --shared `root-config --cflags` `root-config --libs` \ > -I. \ > -o libData.so \ > A.C ADict.C > > g++ -g -o write `root-config --cflags` `root-config --libs` \ > write.C -L. -lData > g++ -g -o read `root-config --cflags` `root-config --libs` \ > read.C -L. -lData > ////////////////////////////////////////////////////////////// > > Run as follows. > source make.sh > ./write test.root > ./read test.root > #--> succesfully operated > > ROOT [0] .x test.C > #--> 'tree->Draw("aa[][]");' didn't work. > > -------------------------------------------------------------------------------- > Name: test.tgz > test.tgz Type: unspecified type (Application/Octet-Stream) > Encoding: base64
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