dear rooters,
I have a TH2.
I want to re-weight each bin according to the average of a
variable with
respect to the number of elements contained in each bin.
For example: if I have a tree with X Y and V leaves,
by
tree->Draw("Y:X","V","lego");
I get a 3-D plot with for each bin, on the Z axis, the sum of the values
related variable V over all the elements which occur in such bin.
Instead I would like to have an average of V for each bin.
I noticed that it is possible to create a structure (an array) of the
square of the bins' content with
TH1::Sumw2()
Now, do exist an option that authomatically performs
what I want (by using somehow such weight-structure), or should I write it
by myself?
Regards,
Tommaso
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:17 MET