[R] scan - open text file as list

William Dunlap wdunlap at tibco.com
Wed Apr 15 16:40:30 CEST 2015


> strsplit(x=sub(pattern="^\\* ", replacement="", x=test), split=" ")
[[1]]
[1] "a" "b" "d"

[[2]]
[1] "z"  "u"  "i"  "h"  "hh"

[[3]]
[1] "h"  "bh" "kk"


Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Tue, Apr 14, 2015 at 2:34 PM, Hermann Norpois <hnorpois at gmail.com> wrote:

> Hello,
>
> I try to open a text file test.txt with the content
>
> * a b d
> * z u i h hh
> * h bh kk
>
> so that I get a list with each line as a vector with the letters as
> elements of the the vector.
>
> My approach ...
> test <- scan ("test.txt", what="character", sep="\n")
> Read 3 items
> > test.list <- lapply (test, function (x) {a <- unlist (strsplit(x," ")); a
> <- a[-1]})
> > test.list
> [[1]]
> [1] "a" "b" "d"
>
> [[2]]
> [1] "z"  "u"  "i"  "h"  "hh"
>
> [[3]]
> [1] "h"  "bh" "kk"
>
> ... the result is okay but I dont think it is an elegant solution. One
> comment: I dont know how many lines my "real" test.txt will have.
> Thanks Hermann
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>

	[[alternative HTML version deleted]]



More information about the R-help mailing list