frostFreqs: Frequency of frosts

In agroclim: Climatic Indices for Agriculture

Frequency of frosts

Description

This function calculates the frequency of frost occurrence, by month.

Usage

frostFreqs(
  mn,
  dates,
  thres = 0,
  out = NULL,
  iniday = "07-01",
  endday = "06-30"
)

Arguments

mn	vector containing the daily minimum temperature series.
dates	sequence of daily dates coinciding with temperature data series.
thres	temperature threshold considered to trigger frost occurrence (0 by default).
out	system path to the generated output file ('.pdf').
iniday	first day of the year ("dd-mm") to consider for first and last occurrence of frost.
endday	last day of the year ("dd-mm") to consider for first and last occurrence of frost.

Details

Despite the logical threshold of temperature is 0 ºC to determine frost occurrence, the argument "thres" is open to change in case of different units of temperature.

Value

If the output path is defined, a pdf file is created.

Examples

frostFreqs(mn = daily_tmin, dates = seq.Date(as.Date('1981-01-01'),
                             as.Date('2010-12-31'), by ='day'), thres = 0)

agroclim documentation built on Oct. 14, 2022, 9:05 a.m.