[R] list of matrices

[arun]

HI Elisa,
The data that you sent to me is a matrix, (not the list containing 16 matrices). 


 source("Elizanew.txt")
 is.matrix(dat1)
#[1] TRUE
dim(dat1)
#[1] 558  12
dat1<-na.omit(dat1)
 nrow(dat1)
#[1] 508
colMeans(dat1)
 #[1]   970.1942   892.5579   893.3180  1629.0733  5692.8488 12529.8313
 #[7] 13965.5763  9270.4147  4352.4091  2082.5329  1441.8123  1158.6669
A.K.

________________________________
From: eliza botto <eliza_botto at hotmail.com>
To: "smartpink111 at yahoo.com" <smartpink111 at yahoo.com> 
Sent: Wednesday, January 2, 2013 5:41 PM
Subject: RE: [R] list of matrices



dear arun,
can u please try your command on the following




elisa

> Date: Wed, 2 Jan 2013 14:34:05 -0800
> From: smartpink111 at yahoo.com
> Subject: Re: [R] list of matrices
> To: eliza_botto at hotmail.com
> CC: r-help at r-project.org
> 
> Hi,
> Check this link
> http://tolstoy.newcastle.edu.au/R/help/05/04/1765.html
> 
> set.seed(15)
> list1<-lapply(1:3,function(i) matrix(sample(1:10,6,replace=TRUE),ncol=i) )
> lapply(list1,function(x) colMeans(x,na.rm=TRUE))
> [[1]]
> #[1] 6.666667
> 
> #[[2]]
> #[1] 6.333333 6.000000
> ##
> #[[3]]
> #[1] 7.0 9.0 7.5
> A.K.
> 
> 
> 
> 
> 
> ----- Original Message -----
> From: eliza botto <eliza_botto at hotmail.com>
> To: "r-help at r-project.org" <r-help at r-project.org>
> Cc: 
> Sent: Wednesday, January 2, 2013 5:16 PM
> Subject: [R] list of matrices
> 
> 
> dear useRs,
> i have a list containing 16 matrices. i want to calculate  the column mean of each of them.
> i tried
> >sr <- lapply(s,function(x) colMeans(x, na.rm=TRUE))
> but i am getting the following error
> >Error in colMeans(x, na.rm = TRUE) : 'x' must be numeric
> can it be done in any other way? and why i am getting this error??
> thanks in advance..
> elisa                           
>     [[alternative HTML version deleted]]
> 
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