[R] list to matrix?

[arun]

Hi,
Try this:
list1<-list(c(50000, 101), c(1e+05, 46), c(150000, 31), c(2e+05, 17), 
    c(250000, 19), c(3e+05, 11), c(350000, 12), c(4e+05, 25), 
    c(450000, 19), c(5e+05, 16))


res<-t(sapply(list1,function(x) x))
res
#        [,1] [,2]
 #[1,]  50000  101
 #[2,] 100000   46
 #[3,] 150000   31
 #[4,] 200000   17
 #[5,] 250000   19
 #[6,] 300000   11
 #[7,] 350000   12
 #[8,] 400000   25
 #[9,] 450000   19
#[10,] 500000   16

  is.matrix(res)
#[1] TRUE
#or
res1<-sapply(list1,function(x) x)
 is.matrix(res1)
#[1] TRUE
A.K.


----- Original Message -----
From: Sam Steingold <sds at gnu.org>
To: r-help at r-project.org
Cc: 
Sent: Tuesday, December 4, 2012 3:09 PM
Subject: [R] list to matrix?

How do I convert a list to a matrix?

--8<---------------cut here---------------start------------->8---
list(c(50000, 101), c(1e+05, 46), c(150000, 31), c(2e+05, 17), 
    c(250000, 19), c(3e+05, 11), c(350000, 12), c(4e+05, 25), 
    c(450000, 19), c(5e+05, 16))
as.matrix(a)
      [,1]    
[1,] Numeric,2
[2,] Numeric,2
[3,] Numeric,2
[4,] Numeric,2
[5,] Numeric,2
[6,] Numeric,2
[7,] Numeric,2
[8,] Numeric,2
[9,] Numeric,2
--8<---------------cut here---------------end--------------->8---

thanks!

-- 
Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000
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