Dear all, (This issue was previously reported on Bugzilla (https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17770) and discussed on Stack Overflow (https://stackoverflow.com/q/61240049).)
The documentation of xtabs says: "na.action: When it is na.pass and formula has a left hand side (with counts), sum(*, na.rm = TRUE) is used instead of sum(*) for the counts." However, this is not the case: DF <- data.frame(group = c("a", "a", "b", "b"), count = c(NA, TRUE, FALSE, TRUE)) xtabs(formula = count ~ group, data = DF, na.action = na.pass) # group # a b # 1 In the code, na.rm is TRUE if and only if na.action = na.omit: na.rm <- identical(naAct, quote(na.omit)) || identical(naAct, na.omit) || identical(naAct, "na.omit") xtabs(formula = count ~ group, data = DF, na.action = na.omit) # group # a b # 1 1 The example works as documented if we change the code to: na.rm <- identical(naAct, quote(na.pass)) || identical(naAct, na.pass) || identical(naAct, "na.pass") However, there may be something I am missing, and na.omit may be necessary for something else... Best regards, Thomas ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel