R help - Jul 2009 - Problems with lists...

> a
[[1]]
[1] 1 2 3

[[2]]
[1] 4 5 6

[[3]]
[1] 7 8 9

I need to access individual elements, such as the 5 or the 9.  Can anyone
please tell me the syntax to do this?

tia
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Like,
> a = list (1:3,4:6,7:9)
> a
[[1]]
[1] 1 2 3

[[2]]
[1] 4 5 6

[[3]]
[1] 7 8 9
> a [[2]] [2]
[1] 5
> a [[3]] [3]
[1] 9
> 
HTH

--
 David  

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of voidobscura
Sent: Thursday, July 16, 2009 12:11 PM
To: r-help at r-project.org
Subject: [R] Problems with lists...

> a
[[1]]
[1] 1 2 3

[[2]]
[1] 4 5 6

[[3]]
[1] 7 8 9

I need to access individual elements, such as the 5 or the 9.  Can
anyone
please tell me the syntax to do this?

tia
-- 
View this message in context:
http://www.nabble.com/Problems-with-lists...-tp24519517p24519517.html
Sent from the R help mailing list archive at Nabble.com.

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

have a look at the help page for ?"["; try also this

a[[2]]
a[[2]][2]
a[[3]][3]


Best,
Dimitris


voidobscura wrote:
>> a
> [[1]]
> [1] 1 2 3
> 
> [[2]]
> [1] 4 5 6
> 
> [[3]]
> [1] 7 8 9
> 
> I need to access individual elements, such as the 5 or the 9.  Can anyone
> please tell me the syntax to do this?
> 
> tia
-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014