R: Shift Longitude to Range -180 to 180

shiftLongitude {oce} | R Documentation

## Shift Longitude to Range -180 to 180

### Description

This is a utility function used by `mapGrid()`. It works simply by subtracting 180 from each longitude, if any longitude in the vector exceeds 180.

### Usage

    shiftLongitude(longitudes)

### Arguments

`longitudes` | numerical vector of longitudes.

### Value

vector of longitudes, shifted to the desired range.

### See Also

`matrixShiftLongitude()` and `standardizeLongitude()`.

Other functions related to maps: `formatPosition()`, `lonlat2map()`, `lonlat2utm()`, `map2lonlat()`, `mapArrows()`, `mapAxis()`, `mapContour()`, `mapCoordinateSystem()`, `mapDirectionField()`, `mapGrid()`, `mapImage()`, `mapLines()`, `mapLocator()`, `mapLongitudeLatitudeXY()`, `mapPlot()`, `mapPoints()`, `mapPolygon()`, `mapScalebar()`, `mapText()`, `mapTissot()`, `oceCRS()`, `usrLonLat()`, `utm2lonlat()`

[Package oce version 1.7-2 Index]