Hello,
I saw your reply in nabble.? Sorry about that.? I thought the dataset had only few columns.
#You can read first line of a file using:
readLines("foo.txt",n=1)[1]
#The more generic colname substitution
dat1<-read.table(text="
?2.5? 3.6? 7.1? 7.9
?100? 3????? 4????? 2??? 3
?200? 3.1? 4????? 3????? 3
?300? 2.2? 3.3? 2??? 4
?",sep="",header=TRUE)?
#The code should remove the "X" from the column names (row names?)
colnames(dat1)<-gsub("^[X](.*)","\\1",colnames(dat1))
dat1
??? 2.5 3.6 7.1 7.9
100 3.0 4.0?? 2?? 3
200 3.1 4.0?? 3?? 3
300 2.2 3.3?? 2?? 4
plot(colMeans(dat1)~as.numeric(names(dat1)),xlab="Column_Name",ylab="Column_Mean")
A.K.
----- Original Message -----
From: kexinz <zhangchicool at gmail.com>
To: r-help at r-project.org
Cc:
Sent: Thursday, July 12, 2012 2:50 PM
Subject: [R] read.table with numeric row names
I have a text file like this
? ? ? ? 2.5? 3.6? 7.1? 7.9
100? 3? ? ? 4? ? ? 2? ? 3
200? 3.1? 4? ? ? 3? ? ? 3
300? 2.2? 3.3? 2? ? 4
I used "r <- read.table("a.txt", header=T)"
The row names becomes X2.5, X3.6... What I need is the row names are
numeric, so I can use the row names as numbers on x-axis for plotting. e.g.
"plot(colMeans(r)~names(r))", something like this. How to do this?
Thanks.
--
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