usCreateSeasonFactorYdayYear: usCreateSeasonFactorYdayYear

In REddyProc: Data processing and plotting utilities of (half-)hourly eddy-covariance measurements

Description

calculate factors to denote the season for uStar-Filtering by specifying starting day and year of each season

Usage

usCreateSeasonFactorYdayYear(dates, yday = as.POSIXlt(dates)$yday + 
    1L, year = as.POSIXlt(dates)$year + 1900L, starts)

Arguments

dates	POSIXct vector of length of the data set to be filled, specifying the center-time of each record
yday	integer (1-366) vector of length of the data set to be filled, specifying the day of the year (1..366) for each record
year	integer vector of length of the data set to be filled, specifying the year
starts	data.frame with first column specifying the starting yday (integer 1-366) and second column the year (integer e.g. 1998) for each season in increasing order

Details

With default parameterization, dates are assumed to denote begin or center of the eddy time period. If working with dates that denote the end of the period, use yday=as.POSIXlt(fGetBeginOfEddyPeriod(dates))$yday

Value

Integer vector of nrow ds, each unique class representing one season

Author(s)

TW seealso usCreateSeasonFactorMonth (Department for Biogeochemical Integration at MPI-BGC, Jena, Germany)

REddyProc documentation built on May 2, 2019, 5:19 p.m.