AddNorthArrow: Plot north arrow

In EarthSystemDiagnostics/grfxtools: An R package of tools to assist with various plotting tasks

Plot north arrow

Description

Plot a north arrow (pointing directly "up" and with label "N") positioned based on current plot extents.

Usage

AddNorthArrow(
  pos = "topright",
  padin = c(0.15, 0.15),
  scale = 1,
  lwd = 1,
  border = "black",
  cols = c("white", "black"),
  col.text = "black",
  cex.text = 1,
  vadj.text = 0.5
)

Arguments

pos	where to align the north arrow. One of "bottomleft", "bottomright", "topleft", or "topright".
padin	a vector of length 2 determining the distance in inches between the scalebar and the edge of the plottable area.
scale	scale the north arrow to make it bigger or smaller.
lwd	the line width outlining the north arrow.
border	the line color outlining the north arrow.
cols	a vector of length 2 determining the two colors to be drawn for the north arrow.
col.text	color of the text label.
cex.text	character expansion factor for the text label. This is an absolute measure, not scaled by par("cex") or by setting par("mfrow") or par("mfcol").
vadj.text	value in [0, 1] to specify the vertical adjustment of the text label relative to the north arrow, with 0 for top, 1 for bottom, and 0.5 for centered position. On most devices values outside [0, 1] will also work.

Author(s)

Dewey Dunnington, Thomas Münch

Source

Adapted from <https://CRAN.R-project.org/package=prettymapr>

Examples

plot(1 : 5, 1 : 5, asp = 1)
AddNorthArrow()

EarthSystemDiagnostics/grfxtools documentation built on Aug. 5, 2023, 1:43 p.m.