[R] Nested structure data simulation

varin sacha v@r|n@@ch@ @end|ng |rom y@hoo@|r
Sat May 18 22:03:37 CEST 2019

Dear Boris,

Yes, top-down, no problem. Many thanks, but in your code did you not forget "teacher" ? As a reminder teacher has to be nested with classes. I mean the 50 pupils belonging to C1 must be with (teacher 1) T1, the 50 pupils belonging to C2 with T2, the 50 pupils belonging to C3 with T3 and so on.


Le samedi 18 mai 2019 à 16:52:48 UTC+2, Boris Steipe <boris.steipe using utoronto.ca> a écrit : 

Can you build your data top-down?

schools <- paste("s", 1:6, sep="")

classes <- character()
for (school in schools) {
  classes <- c(classes, paste(school, paste("c", 1:5, sep=""), sep = "."))

pupils <- character()
for (class in classes) {
  pupils <- c(pupils, paste(class, paste("p", 1:10, sep=""), sep = "."))


> On 2019-05-18, at 09:57, varin sacha via R-help <r-help using r-project.org> wrote:
> Dear R-Experts,
> In a data simulation, I would like a balanced distribution with a nested structure for classroom and teacher (not for school). I mean 50 pupils belonging to C1, 50 other pupils belonging to C2, 50 other pupils belonging to C3 and so on. Then I want the 50 pupils belonging to C1 with T1, the 50 pupils belonging to C2 with T2, the 50 pupils belonging to C3 with T3 and so on. The school don’t have to be nested, I just want a balanced distribution, I mean 60 pupils in S1, 60 other pupils in S2 and so on. 
> Here below the reproducible example. 
> Many thanks for your help.
> ##############
> set.seed(123)  
> # Génération aléatoire des colonnes 
> pupils<-1:300  
> classroom<-sample(c("C1","C2","C3","C4","C5","C6"),300,replace=T)  teacher<-sample(c("T1","T2","T3","T4","T5","T6"),300,replace=T)  school<-sample(c("S1","S2","S3","S4","S5"),300,replace=T)    

> ##############
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