as.data.frame(ft) seems straightforward enough.
I don't think you actually want a matrix, as they would have to be a character matrix and the ftable object is numeric.
On Fri, 27 May 2011, Marius Hofert wrote:
Dear expeRts, What's the easiest way to convert an ftable object to a matrix such that the row names of the ftable object are shown in the first couple of columns of the matrix? This is (typically) required, for example, when the final goal is to print the matrix via xtable. Below is a rather complicated example of how to do it... Cheers, Marius ## Goal: convert an ftable() to a (character) matrix including the row names of ## the ftable object as columns in the matrix (so that the matrix can be ## nicely printed with xtable() for example) (ft <- ftable(Titanic, row.vars=1:3)) # ftable object rn <- attr(ft, "row.vars") # pick out rownames rn. <- rn[length(rn):1] # unfortunately, we have to (?) change the order due to expand.grid() g <- expand.grid(rn.) # build the 3 columns containing the row names (g. <- g[,length(rn):1]) # change order back; now contains the same row names as ft (ft.mat <- as.matrix(ft)) # convert ftable object to a matrix ## now, cbind g. and ft.mat cbind(g., ft.mat) # => now the rownames are there twice! ... although dim(ft.mat)==c(16, *2*) ## class(g.) => okay, probably we meant: (res <- cbind(as.matrix(g.), ft.mat)) require(xtable) xtable(res) ______________________________________________ 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.
-- Brian D. Ripley, rip...@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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.
