You can do something like
mat <- do.call(cbind, lapply(list.files(".data"),read.table))
## explanation:
lapply(list.files(".data"),read.table)
will store all tables in a list
do.call(cbind,...)
will bind all the columns stored in the list created above.
----- Original Message ----
From: ferreirafm <ferreir...@lim12.fm.usp.br>
To: r-help@r-project.org
Sent: Thursday, July 30, 2009 5:29:46 PM
Subject: [R] concatenating multiple columns from files
R-users,
I want to concatenate columns from different files in a single object.
I'm doing bad. My peace of code is as follow:
rawdata <- list.files("./data")
for (i in rawdata) {
mat[ ] <- read.table(paste(i ,sep=""))
}
At the end of the loop I have just one column. What I'm doing wrong?
Thanks,
Fred
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and provide commented, minimal, self-contained, reproducible code.
