Hello All, I'm trying to write a program that uses the TMapFile class. I need to be able to add some objects to the TMapFile and not others. I discovered that the Add command is unecessary when adding objects. For example: root [0] TMapFile *mfile; root [1] mfile = TMapFile::Create("stuff.map","RECREATE", 30000,"test map file"); root [2] mfile->ls() Object Class Size *** no objects stored in memory mapped file *** root [3] TH2F * ghist; root [4] mfile->ls() Object Class Size *** no objects stored in memory mapped file *** root [5] ghist = new TH2F("Gaussian","This is a gaussian",100,-10,10,100,-10,10); root [7] mfile->ls() Object Class Size Gaussian (null) 0 As you can see the Histogram was added without an explicit mfile->Add(). How do I create a Histogram outside the scope of a TMapFile object once it has been created? And is there any way to know what scopes you are in? thanks, Greg Veramendi LBL
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