sl.lonlat1Dto2D: Inflate Lat-Lon Vectors to Matrices

In FESOM/spheRlab: Spherical Geometry, Analysis, and Plotting of Geoscientific Data on Arbitrary Grids

Inflate Lat-Lon Vectors to Matrices

Description

Inflate latitude and/or longitude vectors to corresponding matrices. By default, rows correspond to latitudes and columns correspond to longitudes; this can be changed by setting swap=TRUE. If only one vector (longitudes or latitudes) is provided, the number of latitudes or longitudes to which the vector shall be inflated must be provided.

Usage

sl.lonlat1Dto2D(lon = NULL, lat = NULL, Nlon = NULL, Nlat = NULL, swap = FALSE)

Arguments

lon	a vector with longitudes.
lat	a vector with latitudes.
Nlon	a scalar giving the number of longitudes to which the latitudes vector shall be inflated. Used only if lon=NULL.
Nlat	a scalar giving the number of latitudes to which the longitudes vector shall be inflated. Used only if lat=NULL.
swap	a logical value indicating whether the rows and columns of the output shall be swapped. By default (swap=FALSE), rows correspond to latitudes and columns correspond to longitudes.

Value

lon	a matrix giving longitudes, inflated from the argument lon to be repeated at different latitudes.
lat	a matrix giving latitudes, inflated from the argument lat to be repeated at different longitudes.

Author(s)

Helge Goessling

Examples

sl.lonlat1Dto2D(lon=seq(-150,150,60),lat=c(-60,60,60))
## Should return:
## $lon
##      [,1] [,2] [,3] [,4] [,5] [,6]
## [1,] -150  -90  -30   30   90  150
## [2,] -150  -90  -30   30   90  150
## [3,] -150  -90  -30   30   90  150
## 
## $lat
##      [,1] [,2] [,3] [,4] [,5] [,6]
## [1,]  -60  -60  -60  -60  -60  -60
## [2,]   60   60   60   60   60   60
## [3,]   60   60   60   60   60   60

FESOM/spheRlab documentation built on April 6, 2024, 6:52 p.m.