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
integer
1L, -5L
double
1.0, 3.14, 5.3E-12, 22/7
character
'a', 'A', 'Sam', 'David', '1', 'one'
logical
a <- 3 > 4, T/F, TRUE/FALSE
complex
3 + 4i
raw
raw(5)
x <- 100L y <- 3.4 z <- x*y m <- "Ten" n <- "10" a <- 3 > 4 b <- 'apple' > 'orange' d <- F > T e <- TRUE > FALSE