Chris Jillings wrote: > > Hi, > I have built a class (.h and .cpp below) which contains two > TCutg objects and 4 TH2F objects. My cut class does two things: it takes > the logical "and" of the two TCutg objects and histograms results. Four > histograms are made: the passes and fails of each TCutg. The problem is > that sometimes the 2-d hist scatter plot for the cut histograms is solid > black. I dumped the histograms (one dump shown below) and in fact they are > empty. > > Any ideas? Chris, Could you ssave the resulting scatter plot into a Root file and send this file to me? I will investigate. Rene Brun
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