[ROOT] 2-dimensional Fit

From: Takefumi SORA (tak-sora@bg7.so-net.ne.jp)
Date: Wed Aug 28 2002 - 19:47:38 MEST 

Hi,

I have two questions about 2-dimensional Fit.

My coding:
Tree->Draw("leaf1:leaf2 >> hist",selection);
TF2 *fit1 = new TF2("fit1","[0]*x+[1]*y+[2]",xmin,xmax,ymin,ymax);
hist->Fit("fit1");
[hist TH2Fclass]

1.When using Fit commend, fitted function usually are drawn in c1 window.
But in this case Only 2-dimensional plot are drawn.
fit function(fit1) doesn't appear.
What is need to add fit function in the window ?

2."[0]*x+[1]*y+[2]" means that we fit hist by ax+by+c=0 ?

Please tell me why I cannot do.


-- 
Takefumi SORA <tak-sora@bg7.so-net.ne.jp>

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