gseason_temp: gseason_temp: Calculates the growing season period as...

In ilyamaclean/climvars: Functions for calculating biologically meaningful climate variables

Description

gseason_temp calculates growing season period where temperatures are above 'lower' and below 'upper' specified limits.

Usage

gseason_temp(temp, tme, lower = 5, upper = 35, nday = 5)

Arguments

temp	a vector of temperature values.
tme	a POSIXlt object representing the date and time of each temps value.
lower	integer specifying lower temperature limit of growing season.
upper	integer specifying upper temperature limit of growing season.
nday	specifies the number of consecutive days of temperatures above 'lower' or below 'upper' before growing season start/end is accepted.

Details

To satisfy the requirements for tme, a POSIXlt object can be created using the tmecreate wrapper function.

Value

A time-series object of binary values, where 1 indicates growing season and 0 indicates not growing season.

See Also

tmecreate() can be used to create a POSIXlt object.

Examples

temps <- 10 * sin(c(0:1459) / (pi * 150)) + rnorm(1460)
tme <- tmecreate(2010, 6)
gseast <- gseason_temp(temps, tme)
plot(gseast)

ilyamaclean/climvars documentation built on June 19, 2019, 2:22 p.m.