Hi Stanislas, There are no restrictions concerning the name of objects. I recommend to not use blanks in the name. Could you tell me which type of problems you had that require a clarification? In case you want to delete all objects stored in the current directory in memory, you can do gDirectory->Delete("*"); Rene Brun On Fri, 22 Nov 2002, Stanislav NESTEROV wrote: > > Hi Luiz, > > Here problem is that the name of the object (not title) can't be > arbitrary. In your case that means you might not use square brackets in > histogram name. I suppose you to do somthing like this: > > Creation: > ________________________________ > TH1F *hist[maxi][maxj]; > for(int i=0;i<maxi;i++) > for(int j=0;j<maxj;j++) > hist[i][j] = new TH1F(Form("hist%d%d",i,j), > "Title",nbins,lowX,hiX); > _________________________________ > Clean up: > > gDirectory->Delete(Form("hist%d%d",I,J)); > _________________________________ > > In this case TDirectory::Delete() method will find your histogram > without any problems. > > I think Rene should clear up things about allowed names of the objects. > I've eventually got some troubles with it too. > > Best regards, > Stanislav. > > On Thu, 21 Nov 2002, Luiz Martins Mundim Filho wrote: > > > I could create the array os histogram as told by Rene: > > > > TH1F *x; > > > > x[i][k] = new TH1F("x[i][k]","title",...) > > > > But now I want to put a protection at the begining of the program, that > > means, deleting the > > histogram before creating it again. I used to do: > > > > gDirectory->Delete("h"); > > > > It work for a normal histogram (h), but it is not working for the array > > above, ROOT keeps warning me about recreation of existing histo and > > about potential memory leakage. As argument to the Delete command above, > > I used a Char_t variable, as: > > > > sprintf(var,"histoname[%d][%d",i,j); > > gDirectory->Delete(var); > > > > Could some of you give me some help? > > > > Thanks in advance. > > > > Luiz > > > > Luiz Martins Mundim Filho wrote: > > > > > Hi rooters > > > > > > In my analysis program, I need a two dimension array of histograms. I > > > found how to define and fill an one dimension array, but could not > > > define one the way I really need. I searched the root site also and > > > found nothing like this. > > > > > > Could you help me? > > > > > > Thanks > > > > > > Luiz > > > > > > > > > >
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