Plot a scale bar.

mf_scale(size, pos = "bottomright", lwd = 1.5, cex = 0.6, col, unit = "km")

## Arguments

size size of the scale bar in units (default to km). If size is not set, an automatic size is used (1/10 of the map width) position. It can be one of 'bottomright', 'bottomleft', or a vector of two coordinates in map units (c(x, y)). width of the scale bar cex of the text color units used for the scale bar. Can be "mi" for miles, "m" for meters, or "km" for kilometers (default)

## Value

No return value, a scale bar is displayed.

## Note

This scale bar is not accurate on unprojected (long/lat) maps.

## Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_scale()