Draw rectangle-like grid

Draw rectangle-like grid

circos.rect(
    xleft, ybottom, xright, ytop,
    sector.index = get.current.sector.index(),
    track.index = get.current.track.index(),
    rot = 0,
    ...)

Arguments

xleft	x for the left bottom points
ybottom	y for the left bottom points
xright	x for the right top points
ytop	y for the right top points
sector.index	Index for the sector
track.index	Index for the track
rot	Rotation of the rectangles. The value is measured clockwise in degree. Rotation is relative to the center of the rectangles.
...	pass to polygon

Details

The name for this function is circos.rect because if you imagine the plotting region as Cartesian coordinate, then it is rectangle. in the polar coordinate, the up and bottom edge become two arcs.

This function can be vectorized.

Examples

circos.initialize(c("a", "b", "c", "d"), xlim = c(0, 10))
circos.track(ylim = c(0, 10), panel.fun = function(x, y) {
    for(rot in seq(0, 360, by = 30)) {
        circos.rect(2, 2, 6, 6, rot = rot)
    }
}, track.height = 0.5)