nlme issue

Good day

I am using R 3.4.1 on Rstudio on windows
I was trying the examples for fitting sitar growth models.I am getting the
following error when run  examples in package sitar and package gmusim.

The code I tried is the following.

library("gmusim", lib.loc="C:/Users/RChiruka/Documents/R/rpackages")

Loading required package: lattice
Loading required package: nlme
Loading required package: splines

I get the following error.

x <- immigrant$age

y <- immigrant$height

id <- immigrant$id

df <- 5

resu1 <- gmusim(x,y,id,df)

Error in pdFactor.pdLogChol(X[[i]], ...) : object 'logChol_pd' not found





When I tried running the following sitar example I got the same error

library("sitar", lib.loc="C:/Users/RChiruka/Documents/R/rpackages")

data(heights)

(m1 <- sitar(x=age, y=height, id=id, data=heights, df=5))

Error in pdFactor.pdLogChol(X[[i]], ...) : object 'logChol_pd' not found

m1 <- sitar(x=age, y=height, id=id, data=heights, df=7)

Error in pdFactor.pdLogChol(X[[i]], ...) : object 'logChol_pd' not found



I don't know what is wrong. Any help would be appreciated.





Regards



Raymond












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