> data.frame()[] NULL data frame with 0 rows > data.frame()[FALSE] Warning in is.na(nm) : is.na() applied to non-(list or vector) NULL data frame with 0 rows > data.frame()[NULL] Warning in is.na(nm) : is.na() applied to non-(list or vector) NULL data frame with 0 rows
Is this a bug? I wouldn't have expected the warning in the last two cases. Regards, Hadley ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
