Re: fit option

Hi Jean-Eric,

Actually the behavior you described in your previous email is somehow "hard-coded" in THistPainter::PaintStat():

   if (dofit == 1) dofit = 111;

where "dofit" is the option you pass to SetOptFit. I guess in the author mind the value 1 meant "default value" and default is 111. This is like that since the very fist version of THistPainter::PaintStat() available in CVS, so I don't think we can change it. But we can document it properly. I'll do that.

Cheers, Olivier

On Wed, 15 Jun 2005, Jean-Eric Campagne wrote:

> Thanks Olivier, I was going mad...
> Cheers
> J.E
>
> --On mercredi 15 juin 2005 16:12 +0200 Olivier Couet <couet_at_mail.cern.ch>
> wrote:
>
> >
> > Hi,
> >
> > The TStyle doc says:
> >
> > // The type of information about fit parameters printed in the histogram
> > // statistics box can be selected via the parameter mode.
> > // The parameter mode can be = pcev (default = 0111)
> > // v = 1; print name/values of parameters
> > // e = 1; print errors (if e=1, v must be 1)
> > // c = 1; print Chisquare/Number of degrees of freedom
> > // p = 1; print Probability
> > // Example: gStyle->SetOptFit(1011);
> > // print fit probability, parameter names/values and errors.
> > // When "v"=1 is specified, only the non-fixed parameters are shown.
> > // When "v"=2 all parameters are shown.
> > // see also SetOptStat below.
> >
> > Reading my guess would be that you get only the parameter using:
> >
> > gStyle->SetOptFit(1)
> >
> > But you get also Chi/ndf and Errors.
> > Playing a bit with the option I found you get what you want with:
> >
> > gStyle->SetOptFit(2)
> >
> > I will check why the obvious way does not work as explained in the doc.
> >
> > Cheers, Olivier
> >
> > On Wed, 15 Jun 2005, Jean-Eric Campagne wrote:
> >
> > > Helllo,
> > > I would like to show ONLY
> > > parameter values obtained after a histogram fit, that is to say wo any
> > > Chi2/ndof, neither Prob, neither parameter errors.
> > > How should I set gStyle->SetOptFit(XXXX)?
> > > I have tried XXXX=1001 but prob is shown, but using XXX=0001 then the
> > > defualt is used with Chi2/ndof + param + errors...
> > >
> > > Regards
> > > Jean-Eric
> > >
> > > ........................................................................
> > > ... .LAL - IN2P3 - CNRS
> > > .LAL - B.P 34 - 91898 Orsay Cedex - France
> > > .Piece 108
> > > .Tel +33 (0)1 64 46 84 29
> > > .Fax +33 (0)1 64 46 83 97
> > > ........................................................................
> > > ...
> > >
> > >
> > >
> >
> > --
> > Org: CERN - European Laboratory for Particle Physics.
> > Mail: 1211 Geneve 23 - Switzerland Mailbox: J25910
> > E-Mail: Olivier.Couet_at_cern.ch Phone: +41 22
> > 7676522 WWW: http://cern.ch/Olivier.Couet/ Fax:
> > +41 22 7670300
>
>
>
> ...........................................................................
> .LAL - IN2P3 - CNRS
> .LAL - B.P 34 - 91898 Orsay Cedex - France
> .Piece 108
> .Tel +33 (0)1 64 46 84 29
> .Fax +33 (0)1 64 46 83 97
> ...........................................................................
>
>
>

-- 
Org:    CERN - European Laboratory for Particle Physics.
Mail:   1211 Geneve 23 - Switzerland                     Mailbox: J25910      
E-Mail: Olivier.Couet_at_cern.ch                            Phone:   +41 22 7676522
WWW:    http://cern.ch/Olivier.Couet/                    Fax:     +41 22 7670300