[ROOT] Drawing tree with weight function

From: Viatcheslav Kouznetsov (kuznets@ifh.de)
Date: Mon Jul 02 2001 - 22:03:22 MEST 

Hi ROOTers!
I have a little question.
How I can draw tree with a my weight function?
An example:

//------MyMacro.C------
// x, y, z - variables from MyTree

Float_t MyFunc(Float_t x, Float_t y)
{
/*
  Something doing with x & y
  Very complicated and big code.
*/
 return some_weight;
}

void MyMacro()
{
  Tree *t = (Tree *) gROOT->FindObject("MyTree");
  t->Draw("z",???????);
}

//------End of MyMacro.C------

??????? - It's a MyFunc(x, y) or something else?
I want to draw "z*some_weight"


In the PAW, I can just use UWFUNC, e.g.
PAW> nt/pl 1.z uwfunc.f

Best wishes,
   Slava.

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