R: axis with degrees

degreeAxis {RgoogleMaps} | R Documentation

## axis with degrees

### Description

add an axis with degree labels

### Usage

    degreeAxis(side, at = NULL, labels, MyMap, ...)

### Arguments

`side` | integer; see axis
`at` | numeric; if missing, axTicks is called for nice values; see axis
`labels` | character; if omitted labels are constructed with degree symbols, ending in N/S/E/W; in case of negative degrees, sign is reversed and S or W is added; see axis
`MyMap` | optional map object to be passed
`...` | optional arguments to axis

### Value

axis is plotted on current graph

### Note

decimal degrees are used if variation is small, instead of minutes and seconds

### Author(s)

Markus Loecher

### Examples

    xy = cbind(x = 2 * runif(100) - 1, y = 2 * runif(100) - 1)
    plot(xy,xlim=c(-1,1),ylim=c(-1,1))
    degreeAxis(1)
    degreeAxis(2, at = c(-1,-0.5,0,0.5,1))

[Package RgoogleMaps version 1.4.1 Index]