R: Move or Draw to a Specified Position

grid.move.to {grid}

R Documentation

Move or Draw to a Specified Position

Description

Grid has the notion of a current location. These functions sets that location.

Usage

grid.move.to(x = 0, y = 0, default.units = "npc", name = NULL,
             draw = TRUE, vp = NULL)

moveToGrob(x = 0, y = 0, default.units = "npc", name = NULL, vp = NULL)

grid.line.to(x = 1, y = 1, default.units = "npc",
             arrow = NULL, name = NULL,
             gp = gpar(), draw = TRUE, vp = NULL)

lineToGrob(x = 1, y = 1, default.units = "npc", arrow = NULL,
           name = NULL, gp = gpar(), vp = NULL)

Arguments

`x`	A numeric value or a unit object specifying an x-value.
`y`	A numeric value or a unit object specifying a y-value.
`default.units`	A string indicating the default units to use if `x` or `y` are only given as numeric values.
`arrow`	A list describing arrow heads to place at either end of the line, as produced by the `arrow` function.
`name`	A character identifier.
`draw`	A logical value indicating whether graphics output should be produced.
`gp`	An object of class `gpar`, typically the output from a call to the function `gpar`. This is basically a list of graphical parameter settings.
`vp`	A Grid viewport object (or NULL).

Details

Both functions create a move.to/line.to grob (a graphical object describing a move-to/line-to), but only grid.move.to/line.to() draws the move.to/line.to (and then only if draw is TRUE).

Value

A move.to/line.to grob. grid.move.to/line.to() returns the value invisibly.

Author(s)

Paul Murrell

Examples

grid.newpage()
grid.move.to(0.5, 0.5)
grid.line.to(1, 1)
grid.line.to(0.5, 0)
pushViewport(viewport(x=0, y=0, w=0.25, h=0.25, just=c("left", "bottom")))
grid.rect()
grid.grill()
grid.line.to(0.5, 0.5)
popViewport()

[Package grid version 2.15.1 Index]