tempDayprob: First day in the year where P(tmax>threshold) >= probs

In agroclim: Climatic Indices for Agriculture

First day in the year where P(tmax>threshold) >= probs

Description

Calculates the first day in the year where the probability of temperature over a threshold is higher than a predefined threshold.

Usage

tempDayprob(
  mx,
  dates,
  iniday = "01-01",
  endday = "09-01",
  type = "doy",
  thres = 35,
  prob = 0.1
)

Arguments

mx	vector of daily (usually maximum) temperature series.
dates	vector of dates corresponding with daily temprature series
iniday	first day of the year ("dd-mm-YYYY") when frost occurrence will be considered.
endday	last day of the year ("dd-mm-YYYY") when frost occurrence will be considered.
type	type of output. It can be "doy" for day of the year (julian day) or "date" for data format ("dd-mm").
thres	temperature threshold considered to trigger frost occurrence (0 by default).
prob	numeric. Threshold indicating the probability (0.10 by default)

Details

The function is able to span over years. If the argument "enddate" is a date earlier than "inidate", the considered period will cover from "inidate" to the end of the year and from the beginning of the next year to "enddate".#' @return depending on argument type, the output will be a numeric vector of julian days (type = "doy") or a vector of characters with dates (type = "date").

Value

A numeric vector with annual values is returned.

Examples

tempDayprob(mx = daily_tmax, 
  dates = seq.Date(as.Date('1981-01-01'), 
                             as.Date('2010-12-31'), by ='day'), 
  iniday = '01-01', 
  endday = '09-01', 
  type = 'date',
  prob = 0.10)

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