DescTools (version 0.99.14)

PolarGrid: Plot a Grid in Polar Coordinates

Description

PolarGrid adds a polar grid to an existing plot. The number of radial gridlines are set by ntheta and the tangential lines by nr.

Usage

PolarGrid(nr = NULL, ntheta = NULL, col = "lightgray", lty = "dotted", lwd = par("lwd"), 
          rlabels = NULL, alabels = NULL, lblradians = FALSE)

Arguments

nr
number of circles. When NULL, as per default, the grid aligns with the tick marks on the corresponding default axis (i.e., tickmarks as computed by axTicks). When NA, no circular grid lines are drawn.
ntheta
number of radial grid lines. Defaults to 12 uniformly distributed between 0 and 2*pi (each pi/3).
col
character or (integer) numeric; color of the grid lines.
lty
character or (integer) numeric; line type of the grid lines.
lwd
non-negative numeric giving line width of the grid lines.
rlabels
the radius labels. Use NA if no labels should be to be added.
alabels
the labels for the angles, they are printed on a circle outside the plot. Use NA for no angle labels.
lblradians
logic, defines if angle labels will be in degrees (default) or in radians.

Details

This can be made better....

See Also

PlotPolar

Examples

Run this code
Canvas(xlim=c(-5,5), xpd=TRUE)
PolarGrid()

Canvas(xlim=c(-5,5), xpd=TRUE)
PolarGrid(nr=0:5, ntheta=6)

Canvas(xlim=c(-5,5), xpd=TRUE)
PolarGrid(ntheta=36, rlabels=NA, lblradians=TRUE)

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