SelBox: Select spatial region from multidimensional arrays

In ClimProjDiags: Set of Tools to Compute Various Climate Indices

Select spatial region from multidimensional arrays

Description

Subset a spatial region from spatial data giving a vector with the maximum and minimum of latitudes and longitudes of the selected region.

Usage

SelBox(data, lon, lat, region, londim = "lon", latdim = "lat", mask = NULL)

Arguments

data	An array with minimum two dimensions of latitude and longitude.
lon	Numeric vector of longitude locations of the cell centers of the grid of data'.
lat	Numeric vector of latitude locations of the cell centers of the grid of data'.
region	A vector of length four indicating the minimum longitude, the maximum longitude, the minimum latitude and the maximum latitude.
londim	A character string indicating the name of the longitudinal dimension. The default value is 'lon'.
latdim	A character string indicating the name of the latitudinal dimension. The default value is 'lat'.
mask	A matrix with the same spatial dimensions of data.

Value

A list of length 4:

• $data, an array with the same dimensions as the input data array, but with spatial dimension reduced to the selected region.

• $lat, a vector with the new corresponding latitudes for the selected region.

• $lon, a vector with the new corresponding longitudes for the selected region.

• $mask, if parameter mask is supplied, an array with reduced length of the dimensions to the selected region. Otherwise, a NULL element is returned.

Examples

# Example with synthetic data:
data <- 1:(20 * 3 * 2 * 4)
dim(data) <- c(lon = 20, lat = 3, time = 2, model = 4)
lon <- seq(2, 40, 2)
lat <- c(1, 5, 10)

a <- SelBox(data = data, lon = lon, lat = lat, region = c(2, 20, 1, 5), 
           londim = "lon", latdim = "lat", mask = NULL)

ClimProjDiags documentation built on May 29, 2024, 8:56 a.m.