get.cell.meta.data: Get the meta data of a cell
In 1156054203/circlize-: Circular Visualization

Description Usage Arguments Details References See Also Examples

Get the meta data of a cell

1 2	get.cell.meta.data(name, sector.index = get.current.sector.index(), track.index = get.current.track.index())

`name`	Only support one name at a time, see "details" section
`sector.index`	Index of the sector
`track.index`	Index of the track

The following meta information for a cell can be obtained:

sector.index: The name (index) for the sector
sector.numeric.index: Numeric index for the sector
track.index: Numeric index for the track
xlim: Minimal and maximal values on the x-axis
ylim: Minimal and maximal values on the y-axis
xrange: Range of xlim. It equals to xlim[2] - xlim[1]
yrange: Range of ylim
xcenter: Center of x-axis. It equals to (xlim[2] + xlim[1])/2
ycenter: Center of y-axis
cell.xlim: Minimal and maximal values on the x-axis extended by cell paddings
cell.ylim: Minimal and maximal values on the y-axis extended by cell paddings
xplot: Degrees for right and left borders of the cell.
yplot: Radius for top and bottom borders of the cell.
cell.start.degree: Same as xplot[1]
cell.end.degree: Same as xplot[2]
cell.bottom.radius: Same as yplot[1]
cell.top.radius: Same as yplot[2]
track.margin: Margin for the cell
cell.padding: Padding for the cell

The function is useful when using panel.fun in circos.track to get detailed information of the current cell.

Gu, Z. (2014) circlize implements and enhances circular visualization in R. Bioinformatics.

CELL_META is a short version of get.cell.meta.data.

factors = letters[1:4]
circos.initialize(factors, xlim = c(0, 1))
circos.trackPlotRegion(ylim = c(0, 1), panel.fun = function(x, y) {
    print(get.cell.meta.data("xlim"))
})
print(get.cell.meta.data("xlim", sector.index = "a", track.index = 1))
circos.clear()