Hello, I fail to tranfer data from a dataframe to a matrix.
jam is from a dataframe (and belongs still to the class dataframe) and should look like m (see below). > jam vec1 vec3 d1 d2 1 172 173 223 356 > dput (jam) structure(list(vec1 = 172L, vec3 = 173L, d1 = 223L, d2 = 356L), .Names = c("vec1", "vec3", "d1", "d2"), row.names = 1L, class = "data.frame") > m #THIS IS THE AIM [,1] [,2] [1,] 172 223 [2,] 173 356 > dput (m) structure(c(172, 173, 223, 356), .Dim = c(2L, 2L)) How can I transform jam to m? Thanks Hermann [[alternative HTML version deleted]] ______________________________________________ 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.