hc_centered_text-HilbertCurve-method: Add text to the center of the block
In eilslabs/HilbertCurve: Making 2D Hilbert Curve

Description Usage Arguments Details Value Author(s) See Also Examples

Add text to the center of the block

1 2	## S4 method for signature 'HilbertCurve' hc_centered_text(object, ir, labels, x1 = NULL, x2 = NULL, gp = gpar(), ...)

`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.

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.

It is quite experimental and only used internally.

NULL

Zuguang Gu <z.gu@dkfz.de>

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

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")