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is.null(mylist[1]) and is.null(mylist$a) returns different values

Massoud Boroujerdi 
I think look at the manual

Is.null(mylist[[1]])

Will work

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of ce
Sent: 15 June 2017 16:33
To: r-help at r-project.org
Subject: [R] is.null(mylist[1]) and is.null(mylist$a) returns different values

Hi

I have a list :

mylist <- list( a = NULL, b = 1, c = 2 )
$a
NULL
[1] FALSE
[1] TRUE

why? I need to use mylist[1]
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Thread (6 messages)

ce is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15 Rui Barradas is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15 Huzefa Khalil is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15 Massoud Boroujerdi is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15 Jeff Newmiller is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15 William Dunlap is.null(mylist[1]) and is.null(mylist$a) returns different values Jun 15