[ROOT] Suppressing error bars with Sumw2()

From: Amanda Weinstein (amanda@SLAC.stanford.edu)
Date: Tue Jan 07 2003 - 07:32:39 MET 

If I want error bars to be automatically calculated correctly
for scale histograms, I need to invoke hist->Sumw2() first.  But
after that, hist->Draw() always plots the error bars, even when
I don't want them.  How can I suppress them?

				Thanks,
				  Amanda

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