origin

Origin is the date-time for 1970-01-01 GMT in POSIXct
 format. This date-time is the origin for the numbering
 system used by POSIXct, POSIXlt, chron, and Date classes.

datasets

data

chron

Objects to manipulate sequential and seasonal time series. Sequential time series based on time instants and time durations are handled. Both can be regularly or unevenly spaced (overlapping durations are allowed). Only POSIX* format are used for dates and times. The following classes are provided : 'POSIXcti', 'POSIXctp', 'TimeIntervalDataFrame', 'TimeInstantDataFrame', 'SubtimeDataFrame' ; methods to switch from a class to another and to modify the time support of series (hourly time series to daily time series for instance) are also defined. Tools provided can be used for instance to handle environmental monitoring data (not always produced on a regular time base).

Vladislav Navel

timetools

Seasonal/Sequential (Instants/Durations, Even or not) Time
Series

origin function

POSIXt[1:1], format: "1970-01-01 01:00:00"

Format

Garrett Grolemund "grolemund at rice.edu", Hadley Wickham
 "h.wickham at gmail.com"

origin: 1970-01-01 GMT

Description

Usage

Arguments

Format

Author

Details

Examples