@ND - research:johnny_zhang
https://nd.psychstat.org/
2026-05-05T10:32:21+00:00@ND
https://nd.psychstat.org/
https://nd.psychstat.org/_media/wiki/dokuwiki.svgtext/html2016-01-24T14:48:26+00:00Anonymous (anonymous@undisclosed.example.com)grm
https://nd.psychstat.org/research/johnny_zhang/grm
Program scripts for growth rate analysis
Quadratic growth rate model
## R function for quadratic growth rate model
grm<-function(i,T){
## write the model in Mplus language
filename<-'model.inp';
cat('TITLE: Growth rate model;\n',file=filename)
cat('DATA: FILE IS data.txt;\n',file=filename,append=T)
cat('VARIABLE:\n',file=filename,append=T)
cat(' NAMES ARE math1-math10 bpi gender;\n',file=filename,append=T)
cat(' USEVARIABLES ARE\n',file=filename,append=T)
cat(…