Art,
The HESSE algorithm is automatically called when you specify
the fitting option "E" to TH1::Fit. This calls both HESSE
and MINOS.
If you want to call only HESSE, you must make a call directly to Minuit
with
int err=0
gMinuit->mnexcm("HESSE",0,0,err);
Rene Brun
On Mon, 27 Sep
2004, Arthur E. Snyder wrote:
> After I've fit a histogram is there some way a can invoke Hesse?
>
> -Art S.
>
> A.E. Snyder, Group EC \!c*p?/
> SLAC Mail Stop #95 ((. .))
> Box 4349 |
> Stanford, Ca, USA, 94309 '\|/`
> e-mail:snyder@slac.stanford.edu o
> phone:650-926-2701 _
> http://www.slac.stanford.edu/~snyder BaBar
> FAX:650-926-2657 Collaboration
>
>
>
> On Wed, 22 Sep 2004, Hall, Carter R. wrote:
>
> >
> > Hello ROOTers,
> >
> > I'm need some advice about variable
> > length arrays. I'd like to make a tree which
> > contains several arrays. In any one tree
> > the arrays will all have the same length, but
> > I may produce several trees in which the
> > array lengths will differ, so I've declared
> > the arrays as having variable length for rootcint.
> > (Also, the number of arrays can change from
> > one event to the next within the same tree.)
> >
> > To do this I put the array into a class, "MyArray",
> > along with a data member giving the length. Then I
> > make a TClonesArray of MyArrays, and put them into
> > an "Event" object that goes in a tree.
> >
> > I'm able to create the tree, write it to a file,
> > read it, and look at the data with Draw. However,
> > when I use MakeClass to create a macro, called
> > "TestClass", and execute its constructor, the
> > data in my tree becomes lost. This occurs when
> > the SetMakeClass(1) statement is executed.
> > The attached tarfile contains a script called
> > "test_it.C" that should make the library containing
> > the classes and illustrate the problem.
> >
> > I'm guessing that the problem is with the way
> > I've defined my tree... perhaps there is a simpler
> > solution?
> >
> > I'm using ROOT 4.00/08 on a Sun Enterprise 420.
> >
> > Thanks in advance,
> >
> > Carter Hall
> >
> >
> >
> >
>
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