extractvars: Extracts meteorological data

Description

Extracts meteorological data from an object.

Usage

extractvars(object, vars, verbose = FALSE)
extractdates(object, dates = NULL, verbose = FALSE)
extractgridindex(grid, index)
extractgridpoints(grid, points, verbose = FALSE)

Value

Function extractdates(), returns a list with the same length as dates. Each element of the list is a spatial object (SpatialPointsDataFrame, SpatialGridDataFrame or SpatialPixelsDataFrame, depending on the input) with the meteorological data for all the spatial elements. If only one date is asked, the function returns directly the spatial object, without embedding it into a list.
Function extractvars(), returns a list with the same length as vars. Each element of the list is a spatial object (SpatialPointsDataFrame, SpatialGridDataFrame or SpatialPixelsDataFrame, depending on the input) with the meteorological data for all the spatial elements. If only one variable is asked, the function returns directly the spatial object, without embedding it into a list.
Function extractgridindex() returns a data frame.
Function extractgridpoints() returns an object of class SpatialPointsMeteorology.

Arguments

object: An object of class SpatialPointsMeteorology, SpatialGridMeteorology or SpatialPixelsMeteorology.
vars: A character vector with the set of variables to be extracted.
verbose: Boolean flag to print process information.
dates: A vector of Date with a (subset) of dates to be extracted. If NULL all dates will be returned.
grid: An object of class SpatialGridMeteorology-class or SpatialPixelsMeteorology-class with the meteorological data for a full grid or a subset of grid cells, respectively. Alternatively, a string specifying a NetCDF to be read from the disk.
index: An integer with a grid index.
points: An object of class SpatialPoints.

Functions

extractvars():
extractgridindex():
extractgridpoints():

Author

Miquel De Cáceres Ainsa, CREAF

Details

Function extractpoints is deprecated, because its functionality can be achieved using subsetting of spatial classes SpatialGridMeteorology and SpatialPixelsMeteorology.