R help - Oct 2009 - read.table but more tables at once

Dear all,

I have a lot of data files (.txt) that I want to read in all at once, if
possible.
the files have names in time system. for example: RA940101, RA940102,
RA940103, RA940104 an so on.
(meaning: RA, year:91, month: here january, day of the month.)

I tried something like

vektor <- c("RA940101","RA940102","RA940103")

for (x in 1:3)
{ data <- read.table(paste(vektor[x],sep=""),header=F) }

But how can I put the vektor on the left side, so that data would be instead
of data the three first days of the year 1994?

best wishes and thanks a lot for your answers,

Sybille

	[[alternative HTML version deleted]]

Hi,

Try this,

files <- paste("RA94010",1:3,sep="")
# or files <- list.files(pattern = "RA94010")

list.of.data <- lapply(files, read.table, header=F)

# if required, collapse into a single data.frame
do.call(rbind, list.of.data)


HTH,

baptiste

2009/10/28 Sybille Wendel <wendel.sybille at
googlemail.com>:
> Dear all,
>
> I have a lot of data files (.txt) that I want to read in all at once, if
> possible.
> the files have names in time system. for example: RA940101, RA940102,
> RA940103, RA940104 an so on.
> (meaning: RA, year:91, month: here january, day of the month.)
>
> I tried something like
>
> vektor <-
c("RA940101","RA940102","RA940103")
>
> for (x in 1:3)
> { data <- read.table(paste(vektor[x],sep=""),header=F) }
>
> But how can I put the vektor on the left side, so that data would be
instead
> of data the three first days of the year 1994?
>
> best wishes and thanks a lot for your answers,
>
> Sybille
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

On Wed, Oct 28, 2009 at 9:38 AM, Sybille Wendel
<wendel.sybille at googlemail.com> wrote:
> Dear all,
>
> I have a lot of data files (.txt) that I want to read in all at once, if
> possible.
> the files have names in time system. for example: RA940101, RA940102,
> RA940103, RA940104 an so on.
> (meaning: RA, year:91, month: here january, day of the month.)
>
> I tried something like
>
> vektor <-
c("RA940101","RA940102","RA940103")
>
> for (x in 1:3)
> { data <- read.table(paste(vektor[x],sep=""),header=F) }
>
> But how can I put the vektor on the left side, so that data would be
instead
> of data the three first days of the year 1994?
 Store in a list:

data = list()
 for(x  in 1:3){
   data[[vektor[x]]] = read.table(.......)
}

 then you can do data[["RA940101"]] to get that set of data.

 You can also do this by number:

 data[[x]] = read.table(....)

 and then get data[[1]], data[[2]] etc etc.

See any basic R help/tutorial for more information about 'lists'.

Barry