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_bo...@hotmail.com>
To: "smartpink...@yahoo.com" <smartpink...@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: smartpink...@yahoo.com
> Subject: Re: [R] list of matrices
> To: eliza_bo...@hotmail.com
> CC: r-help@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_bo...@hotmail.com>
> To: "r-help@r-project.org" <r-help@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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>
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