deleting histograms

Richard Dubois (richard@SLAC.stanford.edu)
Wed, 17 Mar 1999 21:13:39 -0800

I would like to allow for cleaning up histograms, so I loop over the
objects in gDirectory->GetList() and make a TObjArray of those
inheriting from TH1 (is there a better way?). Then from this list I can
Reset() them or delete them.

If I delete them, I find that, when I redefine the same histogram, it
appears to go through the fill OK, but when I go to draw it, I get a seg
fault.

I'm wondering if Root keeps its own list of histograms and doesn't
realize that I have deleted it.

Is there a safe way to delete the histograms?

Thanks,

Richard

--
Richard Dubois
SLD, Stanford Linear Accelerator Center
Richard@slac.stanford.edu
http://www.slac.stanford.edu/~richard/
650-926-3824
650-926-2923 (FAX)