This function is an EXACT copy of the function circlePlotRad() in the circular package. As the function is not exported by the original package, I have copied it here to resolve the note thrown by devtools::check()
copyOfCirclePlotRad(
xlim = c(-1, 1),
ylim = c(-1, 1),
uin = NULL,
shrink = 1,
tol = 0.04,
main = NULL,
sub = NULL,
xlab = NULL,
ylab = NULL,
control.circle = circular::circle.control()
)the ranges to be encompassed by the x and y axes. Useful for centring the plot.
desired values for the units per inch parameter. If of length 1, the desired units per inch on the x axis.
parameter that controls the size of the plotted circle. Default is 1. Larger values shrink the circle, while smaller values enlarge the circle.
proportion of white space at the margins of plot.
title, subtitle, x label and y label of the plot.
parameters passed to plot.default in order to draw the circle. The function circle.control is used to set the parameters.
No return value, adds to an existing plot.
For more details about the original function, visit the circular package homepage at https://github.com/cran/circular