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

### See Also

Grid, `viewport`, `arrow`

### 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 2.8.1 Index]