Hello! I have a data frame md:
md <- data.frame(x = c(3,5,4,5,3,5), y = c(5,5,5,4,4,1), z = c(1,3,4,3,5,5), device1 = c("c","a","a","b","c","c"), device2 = c("B","A","A","A","B","B")) md[2,3] <- NA md[4,1] <- NA md I want to calculate means by device1 / device2 combinations using dplyr: library(dplyr) md %>% group_by(device1, device2) %>% summarise_each(funs(mean)) However, I am getting some NAs. I want the NAs to be ignored (na.rm = TRUE) - I tried, but the function doesn't want to accept this argument. Both these lines result in error: md %>% group_by(device1, device2) %>% summarise_each(funs(mean), na.rm = TRUE) md %>% group_by(device1, device2) %>% summarise_each(funs(mean, na.rm = TRUE)) Thank you for your advice! -- Dimitri Liakhovitski ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.