R: Creating new variables in a for loop and assign values - r

Question

I would like to create a new variable, assign a list of values, and write into a hierarchical data frame. I tried the below but it is not writing in.
for(i in 1:sample){
for(j in 1:10){
x[,j]<-0
name <- paste("hierdata[[i]]$Test", j, sep = "_")
assign(name, rowSums(alpha+beta+x)))
}
}
Appreciate some help.

Answer 1

To address #Moody_Mudskipper 's comment:
The best way to declare hierarchical data is to use indexed lists:
hierdata <- lapply(1:sample,
function(iterator)
{
temp_list <- lapply(1:10,
function(j)
{
x[,j]<-0
value <- rowSums(alpha+beta+x)
return(value)
})
names(temp_list) <- lapply(1:10,function(j){paste0("temp_",j)})
return(temp_list)
})
not really a "one liner", but it contains all good "stuff". Lapply which returns list by default so it just nests list in each list.
Hope you enjoy some "good practice". :)
I just wanted to address your question precisely in my first try.

Answer 2

Try using
for(i in 1:sample){
hierdata[[i]] <- list()
for(j in 1:10){
code_j_init <- paste0("hierdata[[",i,"]]$Test_",j,"<- list()")
eval(parse(text = code_j_init))
hierdata[[i]][[j]] <- list(1,2,3)
}
}
or
for(i in 1:sample){
hierdata[[i]] <- list()
names <- c()
for(j in 1:10){
hierdata[[i]][[j]] <- list(1,2,3)
names <- c(names,paste0("Test_",j))
}
names(hierdata[[i]]) <- names
}