R: Epoch Day

EPOCHday {RSEIS} | R Documentation

## Epoch Day

### Description

Number of days since Origin Year

### Usage

    EPOCHday(yr, jd = 1, origyr = 1972)

### Arguments

`yr` | year
`jd` | Julian Day
`origyr` | origin year, default=1972

### Details

Either jd or mo, dom can be provided

### Value

List:

`jday` | number of days since the start of origin year
`origyr` | origin year used

### Author(s)

Jonathan M. Lees<jonathan.lees.edu>

### See Also

EPOCHyear, recdate

### Examples

    tyears   <-  1973:2009

    E1  <-  EPOCHday(tyears, jd=1,   origyr=1972       )

    EPOCHyear(E1$jday,   origyr=1972  )

[Package RSEIS version 3.7-4 Index]