Message-ID: <429431D7.9030902@statistik.uni-dortmund.de>
Date: 2005-05-25T08:05:43Z
From: Uwe Ligges
Subject: reading multiple files
In-Reply-To: <20050524150953.18010.qmail@web61312.mail.yahoo.com>
Dave Evens wrote:
> Dear All,
>
>
> How do I read in multiple data frames or matrices in a
> loop, e.g.
>
> for (i in 1:n) {
> channel <- odbcConnectExcel("filenames")
> file[i] <- as.data.frame(sqlFetch(channel,
> "sheet"))
> }
>
> I would like file[i] to be the name of the data.frame
> (i.e. file[1], file[2], file[3],...etc) rather than a
> vector.
The terminology you are using re. R objects seems to be rather confused.
Quite probably you want a list of data frames such as using the
filenames as names for the list elements along the follwoing lines:
library(RODBC)
dataframes <- vector(mode="list", length=length(filenames))
names(dataframes) <- filenames
for(i in filenames){
channel <- odbcConnectExcel(i)
dataframes[[i]] <- sqlFetch(channel, "sheet")
close(channel)
}
Uwe Ligges
> Thanks in advance for any help.
>
> Dave
>
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