Connects dots

Check polar_init() for examples.

polar_connect(data, x1, x2, ...)

Arguments

data	a data.frame contains connections of all events.
x1, x2	the column names (without quote) storing connected events.
...	parameters passing to ggplot2::geom_segment, expect c(x, xend, y, yend) these 4 mapping parameters.

Value

a ggplot object.