IDHeatwavesR: Identify heat waves in a time series
Description
This function identifies heat waves in a time series of temperature
data using a heat wave definition that a heat wave must be a certain number
of days with temperatures equal to or above some threshold temperature.
Usage
IDHeatwavesR(threshold, datafr, numDays)
Arguments
threshold
Numeric string with threshold temperature used in
the heat wave definition, in degrees Fahrenheit.
datafr
A dataframe with daily temperature projections in the
the city being processed. This dataframe must have two columns:
(1) the first column must have the date of each observation, with
class "Date" and; (2) the second column must have temperatures
in degrees Fahrenheit. In the normal running of this package, this
dataframe will be generated by the closure created by
createCityProcessor.
numDays
Integer greater than 0 giving the number of days to
use in the extreme event definition (e.g., numDays = 2 would define a
heat wave as two or more days above the threshold temperature).
Value
Returns the dataframe entered as datafr, but with new
columns providing heat wave identifiers. The returned dataframe will
have new columns for whether a day was part of a heat wave (hw,
0 / 1), and , if it was part of a heat wave, the number of the heat wave
(hw.number).