curve.circular: Draw Function Plots in a Circle
In circular: Circular Statistics

Description Usage Arguments Details Value Author(s) See Also Examples

Draws a curve corresponding to the given function or expression (in x) over the interval [from,to] in a circle. Mainly used to plot circular density functions.

## S3 method for class 'circular'
curve(expr, from=NULL, to=NULL, n=101, add=FALSE, 
  cex=1, axes=TRUE, ticks=FALSE, shrink=1, tcl=0.025, 
  tcl.text=0.125, tol=0.04, uin=NULL, xlim=c(-1, 1), 
  ylim=c(-1, 1), digits=2, modulo=c("2pi", "asis", "pi"), 
  main=NULL, sub=NULL, xlab="", ylab="", 
  control.circle=circle.control(), ...)
## S3 method for class 'function.circular'
plot(x, from=0, to=2*pi, ...)

`expr`	an expression written as a function of `x`, or alternatively the name of a function which will be plotted.
`x`	a ‘vectorizing’ numeric R function.
`from,to`	the range over which the function will be plotted.
`n`	integer; the number of x values at which to evaluate.
`add`	logical; if `TRUE` add to already existing plot.
`axes`	logical: if `TRUE` axis are added to the plot.
`ticks`	logical: if `TRUE` tick - marks are added to the plot.
`shrink`	parameter that controls the size of the plotted circle. Default is 1. Larger values shrink the circle, while smaller values enlarge the circle.
`tcl`	length of the ticks.
`tcl.text`	The position of the axis labels.
`tol`	proportion of white space at the margins of plot.
`uin`	desired values for the units per inch parameter. If of length 1, the desired units per inch on the x axis.
`xlim, ylim`	the ranges to be encompassed by the x and y axes. Useful for centering the plot.
`digits`	number of digits used to print axis values.
`modulo`	the modulo used to process the data.
`main, sub, xlab, ylab, cex`	graphical parameters.
`control.circle`	parameters passed to `plot.default` in order to draw the circle. The function `circle.control` is used to set the parameters.
`...`	parameters, passed to `lines.circular`.

For now, curve circular draws functions defined in radians, counterclockwise coordinate and zero at 0.

A list with information on the plot: zero, rotation and next.points.

Claudio Agostinelli

lines.circular and circle.control

ff <- function(x) sqrt(x)/20
curve.circular(ff)
curve.circular(ff, to=6*pi, join=FALSE, nosort=TRUE, n=1001, modulo="asis",
  shrink=1.2)

plot.function.circular(function(x) dvonmises(x, circular(0), 10), xlim=c(-1, 2.2))