Nick van Eijndhoven wrote: > > Dear ROOTers, > I have a TTree containing a.o. data for calorimeter cells. > A cell is specified by a row and column number (the usual matrix geometry) > and contains some signal. > To view an event I would like to plot row%column in a lego plot with the > signal as weight (= height of the bin). > How can I achieve this ? > The PAW equivalent would be : nt/plot 999.row%col signal > > Within ROOT I tried : (h999 is my TTtree) > > h999.Draw("ROW:COL:SIGNAL","EVENTNO==5","lego") > > but the result is a 3d plot but not in the usual LEGO format, so that I > can't investigate the various signal heights from it. The equivalent of the PAW command above is: h999.Draw("ROW:COL", "SIGNAL"); If you want to make an additional cut and make a lego plot, do: h999.Draw("ROW:COL", "SIGNAL*(EVENTNO==5)","lego") More examples are given in the tutorial ntuple1. Rene Brun
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