yrfraction {season}

Fraction of the Year

Description

Calculate the fraction of the year for a date variable (after accounting for leap years) or for month.

Usage

yrfraction(date, type = "daily")

Arguments

date

a date variable if type=‘daily’, or an integer between 1 and 12 if type=‘monthly’.

type

‘daily’ for dates, or ‘monthly’ for months.

Details

Returns the fraction of the year in the range [0,1).

Value

yrfrac

Fraction of the year.

Author(s)

Adrian Barnett [e-mail]

Examples

# create fractions for the start, middle and end of the year
date = as.Date(c(0, 181, 364), origin='1991-01-01')
# create fractions based on these dates
yrfraction(date)
yrfraction(1:12, type='monthly')