A search for the list2ascii() function, led me to this post by Mike Prager:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/66335.html in which Mike specifically notes: "To write it to a file that can be read by R, I would suggest using "dput" instead." Thus, instead of using list2ascii() on your list object, use: sink("YourTextFile") dput(YourListObject) sink() You can then re-read the text file back into R using: source("YourTextFile") provided of course that you don't compromise the integrity of the file content when you edit the model formulae. See ?sink (or ?capture.output) and ?dput for more help here. However, I wholeheartedly support Bert's recommendation that you use save()/load()/update(), since these functions enable you to work with R objects directly in their native format _within R_, as opposed to messing around with textual representations in an external editor where you risk introducing errors through typos. R is an incredibly powerful environment, when you work within it to take advantage of its power, rather then trying to work around it to obviate it. HTH, Marc Schwartz On Wed, 2006-05-10 at 13:05 -0400, [EMAIL PROTECTED] wrote: > Robert, > thanks first of all. > Actually, the txt file I want to read as a list is like that: > > > $y > $y$mod.1 > [1] "impute.1.y=glm(I(y>0)~x+ z+ w,family=binomial(link =logit),data= > data)" > > $y$mod.2 > [1] "impute.2.y=lm(I(log (y))~x+ z+ w,subset=y>0)" > > $x > [1] "impute.x=lm(x~y+ z+ w, data= data)" > > $z > [1] "impute.z=lm(z~y+ x+ w,data= data)" > > that is a list of 4 elements with the first element > a list as well. > > To save the file I'm using this function: > > list2ascii <- function(x, > file=paste(deparse(substitute(x)),".txt",sep="")) { > > tmp.wid = getOption("width") > options(width=10000) > sink(file) > print(x) > sink() > options(width=tmp.wid) > return(invisible(NULL)) > } > > So, I should read it using > read.fwf("models.txt", width=getOption("width")) > > The problem is that I'm not getting back a list! > Probably I have to play with write.table?!! > thanks, > grazia > > > > > On Wed, 10 May 2006, Robert Citek wrote: > > > Hello Grazia, > > > > On May 10, 2006, at 10:23 AM, [EMAIL PROTECTED] wrote: > >> I'm trying to automate some regression operations in R leaving the > >> possibility to modify the predictors in the regression. > >> > >> For example, I have saved in a list the results and then exported as a txt > >> file, in which we can modify the predictors, putting for example > >> lm(y~x^2) instead of having lm(y~x) as in the original model. > >> > >> Now, I need to import in R the txt file as a list to evaluate the model. > >> Is that possible? > >> > >> I played around with source() and file() but can't figure it out. > > > > What OS are you using? When you say the list is in a text file, how is the > > text file structured, e.g. CSV, TSV, fixed-width, other? > > > > Here's an example of creating, writing, and reading a data.frame: > > > > d <- data.frame(cbind(x=1, y=1:10)) > > write.table(d, file="r-data.txt", sep="\t", na="", quote=FALSE, row.names = > > FALSE) > > d.new <- read.delim("r-data.txt") > > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
