Hello, You are trying to index based on a logical ff vector instead of based on a integer ff vector. Indexing based logical ff vectors are only allowed since version 0.6 of the package which is not on CRAN currently yet.
Jan -- View this message in context: http://r.789695.n4.nabble.com/ffbase-help-with-in-tp4644730p4645268.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.