Hi, 2016-05-23, 12:50 (-0500); Marc Schwartz escriu: > Hi, > > I have not tried an exhaustive set of examples, but I believe that ?xtabs > will get you most of the way there, with the exception of NA handling, > which would require either nuanced use of ?addNA or preprocessing factors > in the input data frame to possibly add NA as a factor level where needed. > > BTW, from ?as.data.frame.table, see the reference there to xtabs() at the > end: > > "The as.data.frame method for objects inheriting from class "table" can be > used to convert the array-based representation of a contingency table to a > data frame containing the classifying factors and the corresponding > entries (the latter as component named by responseName). This is the > inverse of xtabs." > > > For example, from ?xtabs, using the ?UCBAdmissions dataset, which is a 3 > dimension table: > [...]
Thanks... I didn't know about xtabs and addNA. I'll look into it, but at first sight it seems that the functionality is pretty much already covered by some combination of these two,. Regards. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
