ypart {DDM}

determine the proportion of a year passed as of a particular date

Description

The fraction returned by this is used e.g. for intercensal estimates. Function uses 'lubridate' package to handle dates elegantly.

Usage

ypart(Year, Month, Day, reproduce.matlab = TRUE, detect.mid.year = FALSE,
  detect.start.end = TRUE)

Arguments

Year

4-digit year (string or integer)

Month

month digits (string or integer, 1 or 2 characters)

Day

Day of month digits (string or integer, 1 or 2 characters)

reproduce.matlab

logical. Default TRUE. Assume 365 days in a year.

detect.mid.year

logical. if TRUE, June 30 or July 1 will always return .5.

detect.start.end

logical. default TRUE. Should Jan 1 always be 0 and Dec 31 always be 1?