climdex.pcic (version 0.7-2)

climdex.wsdi, climdex.csdi: Warm/Cold Spell Duration Index

Description

These functions compute the climdex indices WSDI and CSDI.

Usage

climdex.wsdi(ci, spells.can.span.years=FALSE)
climdex.csdi(ci, spells.can.span.years=FALSE)

Arguments

ci

Object of type climdexInput.

spells.can.span.years

Whether to allow spells of dry/wet days to span years.

Value

• A vector containing the value of the index for each year.

code

spells.can.span.years

Details

These functions take a climdexInput object as input and compute the climdex indices WSDI and CSDI. These are:

• WSDI:

{Warm Spell Duration Index.} CSDI:{Cold Spell Duration Index.}

References

http://cccma.seos.uvic.ca/ETCCDMI/list_27_indices.shtml

See Also

climdexInput.raw, climdexInput.csv, threshold.exceedance.duration.index.

Examples

## Create a climdexInput object from some data already loaded in and
## ready to go.

## Parse the dates into PCICt.
tmax.dates <- as.PCICt(do.call(paste, ec.1018935.tmax[,c("year",
"jday")]), format="%Y %j", cal="gregorian")
tmin.dates <- as.PCICt(do.call(paste, ec.1018935.tmin[,c("year",
"jday")]), format="%Y %j", cal="gregorian")
prec.dates <- as.PCICt(do.call(paste, ec.1018935.prec[,c("year",
"jday")]), format="%Y %j", cal="gregorian")

## Load the data in.
ci <- climdexInput.raw(ec.1018935.tmax$MAX_TEMP,
ec.1018935.tmin$MIN_TEMP, ec.1018935.prec$ONE_DAY_PRECIPITATION,
tmax.dates, tmin.dates, prec.dates, base.range=c(1971, 2000))

## Create an annual timeseries of the warm spell duration index.
wsdi <- climdex.wsdi(ci)

## Create an annual timeseries of the cold spell duration index.
csdi <- climdex.csdi(ci)

## Print these out for testing purposes.
wsdi
csdi