Extremes
DESCRIPTION:
Returns a number that is the maximum or minimum of the inputs.
USAGE: 
max(..., na.rm = F)
min(..., na.rm = F)
REQUIRED ARGUMENTS:
...:
any number of numeric arguments.
Missing values (NA) are allowed.
OPTIONAL ARGUMENTS:
na.rm=:
logical flag: should missing values be removed before computation? This must be specified in the na.rm= form.
VALUE:
the single maximum (or minimum) value found in the "..." arguments.
DETAILS:
Any NAs in the data produce NA as a result unless na.rm = TRUE.

These are members of the Summary group of generic functions.

NOTE:
pmax and pmin generate a vector of parallel extremes, and range computes both max and min.
SEE ALSO:
cummax , peaks , pmax , range .
EXAMPLES: 
# create some sample objects
x <- c(1, 2, 3)
y <- c(4, 5, NA)


min(na.rm = T, x, y) # returns 1 since na.rm = T
min(x, y) # returns NA