How can I make a list of lists in R

Question

I don t know how to make a list of lists in R  I have several lists  I want to store them in one data structure to make accessing them easier  However  it looks like you cannot use a list of lists in R  so if I get list l1 from another list  say  l2 then I cannot access elements l1  How can I implement it   EDIT- I will show an example of what does not work for me   list1  lt - list   list1 1    1 list1 2    2 list2  lt - list   list2 1     a  list2 2     b  list all  lt - list list1  list2  a   list all 1  a 2     1    NULL   but a should be a list

User · Accepted Answer

You can easily make lists of lists  list1  lt - list a   2  b   3  list2  lt - list c    a   d    b   mylist  lt - list list1  list2    mylist is now a list that contains two lists   To access list1 you can use mylist  1     If you want to be able to something like mylist list1 then you need to do somethingl like  mylist  lt - list list1   list1  list2   list2    Now you can do the following mylist list1     Edit  To reply to your edit   Just use double bracket indexing  a  lt - list all  1   a  1     1  1 a  2     1  2

User · Answer

Using your example    list1  lt - list   list1 1    1 list1 2    2 list2  lt - list   list2 1     a  list2 2     b  list all  lt - list list1  list2    Use      to retrieve an element of a list   b   list all  1    b   1    1  1    2    1  2  class b   1   list

User · Answer

If you are trying to keep a list of lists  similar to python s list append    then this might work   a  lt - list 1 2 3  b  lt - list 4 5 6  c  lt - append list a   list b     gt  c   1     1    1    1  1    1    2    1  2    1    3    1  3     2     2    1    1  4    2    2    1  5    2    3    1  6

User · Answer

As other answers pointed out in a more complicated way already  you did already create a list of lists  It s just the odd output of R that confuses  everybody    Try this    gt  str list all  List of 2     List of 2         num 1         num 2     List of 2         chr  a          chr  b    And the most simple construction would be this    gt  str list list 1  2   list  a    b     List of 2     List of 2         num 1         num 2     List of 2         chr  a          chr  b

User · Answer

The example creates a list of named lists in a loop     MyList  lt - list     for  aName in c  name1    name2         MyList  aName    lt - list aName        MyList   name1      MyList   name2      To add another list named  name3  do write     MyList name3  lt - list 1  2  3

[r] How can I make a list of lists in R?

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