Add text to the center of the block

Add text to the center of the block

# S4 method for HilbertCurve
hc_centered_text(object, ir = NULL, labels, x1 = NULL, x2 = NULL, gp = gpar(), ...)

Arguments

object

A HilbertCurve-class object.

ir

an IRanges object that contains positions which correspond to text. The middle points of the intervals will be the positions of the text.

labels

text corresponding to intervals in ir.

x1

if start positions are not integers, they can be set by x1.

x2

if end positions are not integers, they can be set by x2.

gp

graphic parameters for text. It should be specified by gpar.

...

pass to grid.text. E.g. you can set text justification by just here.

Details

If the interval is long enough that it represents as a block in the 2D space, the corresponding label is put approximately at center (or at least inside) of the block.

Please use hc_text,HilbertCurve-method directly.

Value

NULL

See also

It is used in hc_map,GenomicHilbertCurve-method to put chromosome names in the center of chromosomes.

Author

Zuguang Gu <z.gu@dkfz.de>

Examples

hc = HilbertCurve(1, 10)
hc_rect(hc, x1 = c(1, 3, 7), x2 = c(3, 7, 10), gp = gpar(fill = 2:5))
hc_centered_text(hc, x1 = 1, x2 = 3, labels = "A")
hc_centered_text(hc, x1 = 3, x2 = 7, labels = "B")
hc_centered_text(hc, x1 = 7, x2 = 10, labels = "C")