summary
dplyr
library(dplyr)
base::reshape
library(reshape2)
reshape2
library(tidyr)
duplicated
unique
is.na
na.omit
complete.cases
base::merge
merge
join
sqldf
NA
Arrange the subjects in the ascending order of Age
Age
Arrange the subjects in the descending order of Wt
Wt
Arrange the subjects in the ascending order of Age and then descending order of Wt
Arrange the subjects with Vac
Vac