Thank you, Prof Ripley. However, there is still something unclear to me about read.ftable. I noticed the following behavior, which I found strange. I expected read.ftable to be an "inverse" of write.ftable, so to speak. Is there something I am missing, or is this a problem in read.ftable?
Thanks, Giovanni > file <- tempfile() > cat(" Intercourse\n", + "Race Gender Yes No\n", + "White Male 43 134\n", + " Female 26 149\n", + "Black Male 29 23\n", + " Female 22 36\n", + file = file) > file.show(file) Intercourse Race Gender Yes No White Male 43 134 Female 26 149 Black Male 29 23 Female 22 36 > ft <- read.ftable(file) > ft ## OK so far Intercourse Yes No Race Gender White Male 43 134 Female 26 149 Black Male 29 23 Female 22 36 > x <- as.table(ft) > write.ftable(ftable(x, col.vars=2:3), file) > file.show(file) "Gender" "Male" "Female" "Intercourse" "Yes" "No" "Yes" "No" "Race" "White" 43 134 26 149 "Black" 29 23 22 36 > ft2 <- read.ftable(file) > ft2 Gender Male Female Intercourse Yes No Yes No Yes No Yes No Race White 43 134 26 149 29 23 22 36 Black 43 134 26 149 29 23 22 36 > version _ platform sparc-sun-solaris2.8 arch sparc os solaris2.8 system sparc, solaris2.8 status major 2 minor 4.1 year 2006 month 12 day 18 svn rev 40228 language R version.string R version 2.4.1 (2006-12-18) -- Giovanni Petris <[EMAIL PROTECTED]> Associate Professor Department of Mathematical Sciences University of Arkansas - Fayetteville, AR 72701 Ph: (479) 575-6324, 575-8630 (fax) http://definetti.uark.edu/~gpetris/ ______________________________________________ R-help@stat.math.ethz.ch 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.