[R] growth curve estimation

2013-12-13 Thread Robert Rigby
t;r-help@r-project.org" Subject: Re: [R] growth curve estimation Message-ID: <33d76d77e9ac4b438da38b348ed6890d0b90b...@email.ktkdom.pte.hu> Content-Type: text/plain; charset="iso-8859-2" Dear Vito, Robert and David, thank you for your replies, although I made some step

Re: [R] growth curve estimation

2013-12-10 Thread Dániel Kehl
_ Feladó: David Winsemius [dwinsem...@comcast.net] Küldve: 2013. december 9. 21:40 To: Dániel Kehl Cc: r-help@r-project.org Tárgy: Re: [R] growth curve estimation On Dec 8, 2013, at 7:45 AM, Dániel Kehl wrote: > Dear Community, > > I am struggling with a growth curve e

Re: [R] growth curve estimation

2013-12-09 Thread David Winsemius
On Dec 8, 2013, at 7:45 AM, Dániel Kehl wrote: > Dear Community, > > I am struggling with a growth curve estimation problem. It is a classic BMI > change with age calculation. I am not an expert of this field but have some > statistical experience in other fields. > Of course I started reading

Re: [R] growth curve estimation

2013-12-09 Thread Robert Rigby
Dear Daniel, There are several papers which use gamlss for centile estimation. See www.gamlss.org/ and click MORE ON GAMLSS, Books & Articles. In particular Rigby and Stasinopoulos (2004, 2005, 2006, 2013) and Stasinopoulos and Rigby (2007). m3 <- gamlss(BMI~age, family=BCT, data=adatok_f

Re: [R] growth curve estimation

2013-12-09 Thread Vito M. R. Muggeo
dear Daniel, yet another package performing growth modelling is quantregGrowth. It uses quantile regressions with B-splines and quadratic penalties to ensure flexible estimation with additional noncrossing and monotonicity (optional) constraints. The paper underlying the package is here: htt

[R] growth curve estimation

2013-12-08 Thread Dániel Kehl
Dear Community, I am struggling with a growth curve estimation problem. It is a classic BMI change with age calculation. I am not an expert of this field but have some statistical experience in other fields. Of course I started reading classical papers related to the topic and understood the co