R help - Oct 2008 - Error in sample(colnames(B), 10) : invalid 'x' argument

HI,

I have a file named "s1"(which has 14 rows and 4 columns) which is in
csv
format. I import and call it "A" the file using:

A <- read.csv(file="s1.csv",head=TRUE,sep=",")

then I transpose it and call it "B"(which will have 4 rows and 14
columns)
using:

B=t(A)

when I want to make 5 samples from "B" (choosing 10 columns) using: 

result=replicate(5,B[,sample(colnames(B),10)],simplify=FALSE)

I get the following error:

"Error in sample(colnames(B), 10) : invalid 'x' argument"

anyone has any idea,why?and how to fix it?

Thanks
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What I would do (and I think a lot of people
on this list) is to type:

colnames(B)

to see why 'sample' might not like it.  There are
debugging tools in R, this seems like a good
opportunity to use them.

Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and "A Guide for the Unwilling S User")

Alex99 wrote:
> HI,
>
> I have a file named "s1"(which has 14 rows and 4 columns) which
is in csv
> format. I import and call it "A" the file using:
>
> A <- read.csv(file="s1.csv",head=TRUE,sep=",")
>
> then I transpose it and call it "B"(which will have 4 rows and 14
columns)
> using:
>
> B=t(A)
>
> when I want to make 5 samples from "B" (choosing 10 columns)
using:
>
> result=replicate(5,B[,sample(colnames(B),10)],simplify=FALSE)
>
> I get the following error:
>
> "Error in sample(colnames(B), 10) : invalid 'x' argument"
>
> anyone has any idea,why?and how to fix it?
>
> Thanks
>