Draw sectors or rings in a circle

draw.sector(
    start.degree = 0,
    end.degree = 360,
    rou1 = 1,
    rou2 = NULL,
    center = c(0, 0),
    clock.wise = TRUE,
    col = NA,
    border = "black",
    lwd = par("lwd"),
    lty = par("lty"))

Arguments

start.degree	start degree for the sector
end.degree	end degree for the sector
rou1	Radius for one of the arc in the sector
rou2	Radius for the other arc in the sector
center	Center of the circle
clock.wise	The direction from `start.degree` to `end.degree`
col	Filled color
border	Border color
lwd	Line width
lty	Line style

Details

If the interval between start and end (larger or equal to 360 or smaller or equal to -360) it would draw a full circle or ring. If rou2 is set, it would draw part of a ring.

Examples

plot(c(-1, 1), c(-1, 1), type = "n", axes = FALSE, ann = FALSE, asp = 1)
draw.sector(20, 0)
draw.sector(30, 60, rou1 = 0.8, rou2 = 0.5, clock.wise = FALSE, col = "#FF000080")
draw.sector(350, 1000, col = "#00FF0080", border = NA)
draw.sector(0, 180, rou1 = 0.25, center = c(-0.5, 0.5), border = 2, lwd = 2, lty = 2)
draw.sector(0, 360, rou1 = 0.7, rou2 = 0.6, col = "#0000FF80")

sectors = letters[1:8]
circos.initialize(sectors, xlim = c(0, 1))
for(i in 1:3) {
    circos.trackPlotRegion(ylim = c(0, 1))
}
circos.info(plot = TRUE)

draw.sector(get.cell.meta.data("cell.start.degree", sector.index = "a"),
            get.cell.meta.data("cell.end.degree", sector.index = "a"),
            rou1 = 1, col = "#FF000040")

draw.sector(0, 360,
    rou1 = get.cell.meta.data("cell.top.radius", track.index = 1),
    rou2 = get.cell.meta.data("cell.bottom.radius", track.index = 1),
    col = "#00FF0040")

draw.sector(get.cell.meta.data("cell.start.degree", sector.index = "e"),
            get.cell.meta.data("cell.end.degree", sector.index = "f"),
            get.cell.meta.data("cell.top.radius", track.index = 2),
            get.cell.meta.data("cell.bottom.radius", track.index = 3),
            col = "#0000FF40")

pos = circlize(c(0.2, 0.8), c(0.2, 0.8), sector.index = "h", track.index = 2)
draw.sector(pos[1, "theta"], pos[2, "theta"], pos[1, "rou"], pos[2, "rou"],
    clock.wise = TRUE, col = "#00FFFF40")
circos.clear()