as.station: Coerce input to a 'station' object

In metno/esd: Climate analysis and empirical-statistical downscaling (ESD) package for monthly and daily data

Coerce input to a station object

Description

Transform an input object into the esd class station. as.station is an S3 method and will redirect to a fitting function depending on the type of input data.

Usage

as.station(x, ...)

Arguments

x	the input object
...	other arguments
loc	location(s), e.g, "Manchester" or c("Oslo","Bergen")
param	short name of variable
unit	unit of variable, e.g., 't2m'
lon	longitude(s), a numerical or numerical vector
lat	latitudes(s), a numerical or numerical vector
alt	altitude(s), a numerical or numerical vector
cntr	country, a character string or vector of character strings
longname	long name of variable, e.g, 'temperature at 2m'
calendar	calendar type
stid	station id, a numerical or numerical vector
quality	quality flag
src	source of data
url	url to website where data can be downloaded
reference	reference describing data set
info	additional information
method	method applied to data
type	type of data
aspect	aspect describing data, e.g., 'original', 'anomaly', 'climatology'
verbose	a boolean; if TRUE print information about progress

Details

as.station.zoo and as.station.data.frame adds attributes and changes the class to transform the input to a 'station' object.

as.station.field returns an object where every grid box is represented as one station.

as.station.pca transforms a 'pca' object (see PCA) to a 'station' object using the method pca2station.

as.station.eof represents the principle components of an 'eof' object as different stations.

as.station.dsensemble transform a dsensemble object to a station object in one of two ways: i) If the input is of class dsensemble pca, you are redirected to as.station.dsensemble.pca which calculates the downscaled ensemble for each station based on the downscaled ensemble of principle components, returning a dsensemble station or dsensemble list object. ii) If the input is a dsensemble station or dsensemble list object, you are redirected to as.station.dsensemble.station which returns a station object holding the ensemble mean (or another statistical characteristic of the ensemble, see input argument FUN) of the downscaled results for each station.

as.station.events and as.station.trajectory aggregate an 'event' or 'trajectory' object to a 'station' object by aggregating some aspect of the cyclones/anti-cyclones (or other type of event). By default, the total number of events/trajectories per month is calculated but the method can also estimate some other characteristic, e.g., the monthly mean sea level pressure at the center of the cyclones ().

Value

a station object

See Also

as.station.dsensemble as.station.dsensemble.pca as.station.dsensemble.station

Examples

# How to generate a new 'station' object
data <- round(matrix(rnorm(20*12),20,12),2)
colnames(data) <- month.abb
x <- data.frame(year=1981:2000,data)
X <- as.station(x,loc="",param="noise",unit="none")

# Transform a field object into a station object
slp.field <- slp.DNMI(lon=c(-20,20), lat=c(50,70)) # get example SLP data
slp.station <- as.station(slp.field) # coerce SLP field to a station object
cb <- list(pal="burd", breaks=seq(1000,1020,2)) # specify color bar for maps
map(slp.field, FUN="mean", colbar=cb) # show map of SLP field
map(slp.station, FUN="mean", colbar=cb) # show map of SLP as station data

metno/esd documentation built on April 24, 2024, 9:19 p.m.