Defines the appearance of the guiding elements of rose plots such as circles, rays and labels.
grid.control(circ.n = 4, circ.r = NULL,
             circ.col = "gray30", circ.lwd = 0.5,
             circ.cex = 0.8, circ.between = 0.3,
             circ.dir = pi/16 * 9,
             circ.sub.n = NULL, circ.sub.r = NULL,
             circ.sub.col = "gray70", circ.sub.lwd = 0.5,
             cyclVar.lab = c("N","NE","E","SE","S","SW","W","NW"),
             cyclVar.cex = 1.2, cyclVar.between = 0,
             cyclVar.centered = TRUE,
             ray.lim = NULL, ray.n = 8)Returns the arguments conveniently packaged up in a list to supply the arguments for the grid appearance of rose plot.
Number of (main)circles or, alternatively, radius of circles to be drawn, which will be labeled.
Color and line width of circles.
Character size of labels of main circles in
  multiples of cex as defined in general.control.
Distance between labels of the main circle and the circle itself in multiples of circ.cex.
Direction along which the labels of the main circles should be drawn, measured clockwise as radian from North.
Number of subcircle intervals between two main circles, or, alternatively, the radii of all subcircles.
Color and line width of subcircles.
Labels of cyclic variable placed along the outmost circle.
Charactersize of labels of cyclic
    variable in multiples of cex as defined in
    general.control
Distance between labels of the cyclic
    variable and the outmost circle of the rose in multiples of
    cyclVar.cex.
Labels are positioned relative
    to their center.  cyclVar.centered = FALSE is used for very
    long labels like (unabbreviated) days of the week.  In this case, the
    labels are positioned relative to the side of the label, which is
    closest to the circle.
Defines the values for the center and the maximum radius in user coordinates. Be careful with specifying the center different from 0 as this might result in misleading roses.
Number of rays.
Rene Locher
plot.rose, general.control