yrfraction function

Fraction of the Year

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

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.

Returns

• yrfrac: Fraction of the year.

Details

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

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')

Author(s)

Adrian Barnett a.barnett@qut.edu.au