It might help if you would bore us with at least one or two of the things you have tried. It seems logical to read the file into a data frame using read.table(). Then you can change it into any format you want:
> Listname <- read.table(text="key value Key1 1 Key2 2 Key3 3", header=TRUE) > Listname key value 1 Key1 1 2 Key2 2 3 Key3 3 Just change text=". . . " to file="yourfilename". This will change the key field into a factor. If you don't want to do that use > Listname <- read.table(text="key value Key1 1 Key2 2 Key3 3", header=TRUE, stringsAsFactors=FALSE) If you want to change the data.frame into a list, just use: > Listname <- as.list(Listname) ---------------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77843-4352 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of arun > Sent: Wednesday, October 10, 2012 12:49 PM > To: VA Smith > Cc: R help > Subject: Re: [R] reading in a (very simple) list from a file > > HI, > > By modifying the earlier solution using sapply() > > set.seed(1) > dat1<- > data.frame(keys=paste0("key",1:5),value=sample(1:15,5,replace=TRUE)) > list2<-sapply(split(dat1,dat1$keys),`[`,2) > names(list2)<-dat1[,1] > list2$key2 > #[1] 6 > A.K. > > ----- Original Message ----- > From: VA Smith <v...@st-andrews.ac.uk> > To: r-help@r-project.org > Cc: > Sent: Wednesday, October 10, 2012 1:29 PM > Subject: [R] reading in a (very simple) list from a file > > Apologies - I feel this is a very simple thing to do yet I am failing > massively. I keep finding information about how to do much more > complicated > things (usually on this mailing list!), which then fail when I try to > apply > it to my simple task. > > Anyway, all I want to do is read in a series of key-value pairs from a > file. > I thought a list would be a good way to keep these, such that I could > access > them like: listname$key > > I was imagining a file like this: > key1 value1 > key2 value2 > key3 value3 > ... > > (the keys will always be character strings, the values might be other > types, > but they will always be single items) > > I won't bore you with all the things I've tried. I'm sure I'm > overlooking > something basic and simple, but I would greatly appreciate it if > someone > could help me out here. > > Thank you. > > Best wishes, > Anne > > > > > > -- > View this message in context: http://r.789695.n4.nabble.com/reading-in- > a-very-simple-list-from-a-file-tp4645741.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@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. > > > ______________________________________________ > R-help@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. ______________________________________________ R-help@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.
