invyrfraction function

Inverse Fraction of the Year or Hour

Inverts a fraction of the year or hour to a useful time scale.

invyrfraction(frac, type = "daily", text = TRUE)

Arguments

• frac: a vector of fractions of the year, all between 0 and 1.
• type: ‘daily’ for dates, ‘monthly’ for months, ‘hourly’ for hours.
• text: add an explanatory text to the returned value (TRUE) or return a number (FALSE).

Returns

• daym: date (day and month for daily) or fractional month (for monthly) or fractional of the 24-hour clock (for hourly).

Details

Returns the day and month (for daily) or fraction of the month (for monthly) given a fraction of the year. Assumes a year length of 365.25 days for daily. When using monthly the 1st of January is 1, the 1st of December is 12, and the 31st of December is 12.9. For hourly it returns the fraction of the 24-hour clock starting from zero (midnight).

Examples

invyrfraction(c(0, 0.5, 0.99), type='daily')
invyrfraction(c(0, 0.5, 0.99), type='monthly')
invyrfraction(c(0, 0.5, 0.99), type='hourly')

Author(s)

Adrian Barnett a.barnett@qut.edu.au