timeDate (version 4041.110)

start: Terminal times and range

Description

Extracts the time when the first or last observation was taken, or computes the range of the dates in a "timeDate" object.

Usage

# S3 method for timeDate
start(x, ...)
# S3 method for timeDate
end(x, ...)
# S3 method for timeDate
min(..., na.rm = FALSE)
# S3 method for timeDate
max(..., na.rm = FALSE)
# S3 method for timeDate
range(..., na.rm = FALSE)

Value

an object of class "timeDate"

Arguments

x

an object of class "timeDate".

...

ignored by start and end; a 'timeDate' object for min, max, and range.

na.rm

not used.

Details

Conceptually, the "timeDate" object is sorted before the computations. In particular, start is not necessarilly the first element of the object and similarly for the other functions.

min and max are equivalent to start end end, respectively.

range returns the earlies and the latest times in a "timeDate" object. The remaining functions return only one of them, as suggested by their names.

Examples

## timeCalendar
# Random Calendar Dates:
set.seed(1234)
tR = sample(timeCalendar())
sort(tR)
tR
    
## start | end
start(tR)
end(tR)
   
## the first and last time stamp
tR[1]
tR[length(tR)]
rev(tR)[1]
   
## the range
c(start(tR), end(tR))
range(tR)