search for: hivbl

...stead behaves like if it was a hig order polynomial or something similar!!!! I attach the codes below, hoping someone can point me the mistake.... I sincerely express many thanks in advance ...... Federico Bonofiglio frame3<-data.frame(id,chol,cd4,rt,sex,age, nadir,pharmac2,hbs,hcv,resp2, hivbl,switch) # I run a model specifing the function (t-t*)+ = 0 if t<=t* AND (t-t*)+ = t if t>t* with the following syntax, emulating MJ Crawley (The R book 2007, Wiley), # rt+rt*(rt>15) I run the model, is a mixed effect one....... PCWISE<-lme(chol~rt+rt*(rt>15) +sex+age+c...