## Fitting nlme
## I'm not sure why I wrote this test
library(nlme)
set.seed(101)

run.cv.response <- FALSE

if(run.cv.response){
  
  dat <- expand.grid(time = 1:10, rep = 1:4, trt = letters[1:6])
  dat$eu <- with(dat, paste0(trt,"_",rep))
  
  dat$y <- c(replicate(24, SSlogis(1:10, 10, 5, 1.5) + rnorm(10, sd = 0.25)))
  
  datG <- groupedData(y ~ time | eu, data = dat)
  
  plot(datG)
  
  fitL <- nlsList(SSlogis, datG)
  
  fnm1 <- nlme(fitL, random = pdDiag(Asym + xmid + scal ~ 1))
  
  fxf <- fixef(fnm1)
  
  fnm2 <- update(fnm1, fixed = Asym + xmid + scal ~ trt, 
                 start = c(fxf[1], rep(0, 5), 
                           fxf[2], rep(0, 5),
                           fxf[3], rep(0, 5)))
  
  anova(fnm2)
  
  plot(fnm2)
  
}