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From |
"W.O.Johnson" <W.O.Johnson@lboro.ac.uk> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: how to plot growth curves from two separate multilevel models in one graph |

Date |
Tue, 03 Aug 2010 11:12:25 +0100 |

Hi Nick, I want to fit two MLM growth models (weight age log_age inverse_age plus covariates) using the xtmixed command in stata to two different samples. Fitting the models is no problem, but I can not find a way to plot the mean constant growth curves for each sample in one graph. The command I am using to produce a growth curve is 'twoway (function weight = _b[_cons] + _b[age]*(x) + _b[log_age]*ln(x) +_b[inverse_age]*1/(x)'. The problem is that as soon as I fit the second model the parameter estimates are changed?? Will ------------------------------------------- Dr William Johnson Research Associate Centre for Global Health and Human Development School of Sport, Exercise and Health Sciences Loughborough University Leicestershire LE11 3TU United Kingdom t: +44 (0) 1509 228159 e: W.O.Johnson@lboro.ac.uk -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox Sent: 02 August 2010 18:05 To: statalist@hsphsun2.harvard.edu Subject: st: RE: how to plot growth curves from two separate multilevel models in one graph I imagine that Stata could do this. Given some exact detail on what you want to plot, I imagine that a better answer is also possible. Nick n.j.cox@durham.ac.uk W.O.Johnson I am running an analysis that requires me to fit multilevel growth models to two different samples (I need to use one model for use sample). I want to plot the resulting growth curves for each sample in one graph, but do not know if Stata can do this. Any advice will be gratefully received. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: how to plot growth curves from two separate multilevel models in one graph***From:*David Bell <dcbell@iupui.edu>

**References**:**st: RE: how to plot growth curves from two separate multilevel models in one graph***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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