I use TH1F histograms with huge number of bins (>30000) and I have
some problems/remarks:
- Is there any way to set the range in axis value instead of bins
value ( like H/PL 100(58.3:60.2) in PAW, I had to create a function
to do it with ROOT)?
- When I use TAxis::SetRange with bins numbers above 100000, it failed .
Finally when using a TTree with huge number of entries, the Draw
function seems to consider only the first 10000 entries:
Example:
TTree* h1 contains 990000 entries with 2 branches one with the time T
(every 2 ms) of measuremnt the other with the current I:
h1->Draw("T","T>20","E",100000)
draws the time between 20 and 40 s only
If I book a TH1F with the good range (0,2000 s) it is filled
properly.
Best Regards
laurent
-- Laurent Mirabito IPN Lyon