as.field.default: Coerce input to a 'field' object

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

Coerce input to a field object

Description

Transform an input object into the esd class field. The function first transforms the input object x into a zoo object (zoo(x, order.by=index)) and then applies as.field.zoo to obtain a field object.)

Usage

## Default S3 method:
as.field(
  x,
  ...,
  index,
  lon,
  lat,
  param,
  unit,
  longname = NA,
  quality = NA,
  src = NA,
  url = NA,
  reference = NA,
  info = NA,
  calendar = "gregorian",
  greenwich = TRUE,
  method = NA,
  type = NA,
  aspect = NA,
  verbose = FALSE
)

Arguments

x	the input object
...	other input arguments
lon	longitude(s), a numerical or numerical vector
lat	latitudes(s), a numerical or numerical vector
param	short name of variable
unit	unit of variable, e.g., 't2m'
longname	long name of variable, e.g, 'temperature at 2m'
quality	quality flag
src	source of data
url	url to website where data can be downloaded
reference	reference describing data set
info	additional information
calendar	calendar type
greenwich	a boolean; if TRUE center map on the Greenwich line (0E)
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
time	index

Value

a field object

See Also

as.field as.field.zoo zoo

Examples

# how to generate a new field object.
year <- sort(rep(1991:2000,12))
month <- rep(1:12,length(1991:2000))
n <-length(year)
lon <- seq(-30,40,by=5); nx <- length(lon)
lat <- seq(40,70,by=5); ny <- length(lat)
# Time dimension should come first, space second.
y <- matrix(rnorm(nx*ny*n),n,nx*ny)
index <- as.Date(paste(year,month,1,sep="-"))
Y <- as.field(y,index=index,lon=lon,lat=lat,param="noise",unit="none")
map(Y)

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