[ROOT] sqrt() in TF1

From: Ray Fliller III (rfliller@bnl.gov)
Date: Mon Aug 19 2002 - 16:25:31 MEST


   Rooters,

     I noticed that if I do

    foo=new TF1("foo","sqrt(x)");
    foo->SetRange(-10,10);
    foo->Draw("C")

    what I actually get is sqrt(abs(x)) drawn.  Naively,
   I'd expect to get zeros on the negative side of zero.
   Is there a reason that this convention was chosen other 
   than a simple way to deal with errors from the sqrt function?

-- 

 RAINMAN
      "How much does a piece of gum cost Ray?"
      "About $100."
      "How much does a new car cost Ray?"
      "`Bout $100."
      "There goes working for NASA!"

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