Stephen's right.
. findit denormix
Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Stephen P
> Jenkins
> Sent: 09 March 2004 10:33
> To: [email protected]
> Subject: st: RE: RE: LevenbergMarquardt/summary
>
>
> If you want to fit a mixture of normals, then I think Stas
> Kolenikov has
> a program for doing this.
> -findit- should locate this
>
>
> Stephen
> -------------------------------------------------------------
> Professor Stephen P. Jenkins <[email protected]>
> Institute for Social and Economic Research
> University of Essex, Colchester CO4 3SQ, U.K.
> Tel: +44 1206 873374. Fax: +44 1206 873151.
> http://www.iser.essex.ac.uk
>
>
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of Nick Cox
> > Sent: 09 March 2004 10:16
> > To: [email protected]
> > Subject: st: RE: LevenbergMarquardt/summary
> >
> >
> > It might be better to set this up as a -ml- problem.
> >
> > The text of Sophia Rabe-Hesketh and Brian Everitt
> > discusses the two Gaussians case in detail and poses
> > your case as an exercise, with hints for solution.
> >
> > http://www.stata.com/bookstore/statanalyses.html
> >
> > Nick
> > [email protected]
> >
> > Andreas Aschbacher
> >
> > > In austrian centre of physics we use Stata to do
> > > LevenbergMarquardt(nl-coomand)
> > > please look at my posting from january 20th with
> > > heading:LevenbergMarquardt
> > > short summary :the number of persons who is exposed to a little
> > > dosis-interval /about 0.01 mSv/ yields in sum a curve which
> > is mostly
> > > composed of
> > > two sometimes three humps.above each dosis-interval /about
> > > 0.01 mSv/there is
> > > the number
> > > of persons as function. with Stata it was possible to show
> > that in 397
> > > cases we have the sum of Gau�-distributions.the results are
> > > very useful.
> > > because of lv-command we can talk here about skewness of
> our curves.
> > > median-test is also used very often.we decided to take Stata
> > > to use for our
> > > work becaue it is so easy to split in subgroups and make
> > tests after.
> > > -
> > >
> > > My question: if I have two Gau�-curves to be fitted,it is no
> > > problem to find
> > > values
> > > in Stata.but if I have to find three Gau�-curves,I mean to
> > > come from 1) to
> > > 2) for
> > > example
> > >
> > > 1)
> > > Ai for i = 1,2.... means amplitude
> > > A1 12209.2
> > > �1 4.382678
> > > delta1 0.3097696
> > > A2 21683.69
> > > �2 4.200002
> > > delta2 0.550282
> > >
> > > 2)
> > > A1 11509.05
> > > �1 4.403567
> > > delta1 0.3050716
> > > A2 1305.195
> > > �2 4.18422
> > > delta2 1.100233
> > > A3 21540.19
> > > �3 4.198081
> > > delta3 0.5104234
> > >
> > > I need long time to try.with another famous statistical
> > > software I have
> > > possibility to make
> > > constraints and it takes no long time.
> > > I "fear the worst" that someone(my boss?) will ask me during my
> > > presentation,if there are add-inns in Stata to use or
> > > user-written-programs that I have
> > > this feature.
> > > it is a pity that it is not possible for me to come to 2nd
> > > German Stata
> > > User's meeting in April.
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
