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r define nested empty list

Trustworthy Whale answered on February 11, 2021 Popularity 3/10 Helpfulness 10/10

answer r define nested empty list

r define nested empty list

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rec.list <- function(len){
    if(length(len) == 1){
        vector("list", len)
    } else {
        lapply(1:len[1], function(...) rec.list(len[-1]))
    }
}
depth = c(1, # only one object
          2  # two objects
         )
my.list <- rec.list()

# The obtained structure is: 
## [[1]]
## [[1]][[1]]
## [[1]][[2]]

my.list<-lapply(my.list<-vector(mode = 'list',5),function(x) # 1st level with 5 objects
      x<-lapply(x<-vector(mode = 'list',3),function(x)       # 2nd level with 3 nested objects
      x<-vector(mode='list',2)))                             # 3rd level with 2 nested objects

Popularity 3/10 Helpfulness 10/10 Language r

Source: stackoverflow.com

Tags: empty-list nested r

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