grid.lines
Draw Lines in a Grid Viewport
Description
These functions create and draw a series of lines.
Usage
grid.lines(x = unit(c(0, 1), "npc"), y = unit(c(0, 1), "npc"), default.units = "npc", arrow = NULL, name = NULL, gp=gpar(), draw = TRUE, vp = NULL) linesGrob(x = unit(c(0, 1), "npc"), y = unit(c(0, 1), "npc"), default.units = "npc", arrow = NULL, name = NULL, gp=gpar(), vp = NULL) grid.polyline(...) polylineGrob(x = unit(c(0, 1), "npc"), y = unit(c(0, 1), "npc"), id=NULL, id.lengths=NULL, default.units = "npc", arrow = NULL, name = NULL, gp=gpar(), vp = NULL)
Arguments
x | A numeric vector or unit object specifying x-values. |
y | A numeric vector or unit object specifying y-values. |
default.units | A string indicating the default units to use if |
arrow | A list describing arrow heads to place at either end of the line, as produced by the |
name | A character identifier. |
gp | An object of class |
draw | A logical value indicating whether graphics output should be produced. |
vp | A Grid viewport object (or NULL). |
id | A numeric vector used to separate locations in |
id.lengths | A numeric vector used to separate locations in |
... | Arguments passed to |
Details
The first two functions create a lines grob (a graphical object describing lines), and grid.lines
draws the lines (if draw
is TRUE
).
The second two functions create or draw a polyline grob, which is just like a lines grob, except that there can be multiple distinct lines drawn.
Value
A lines grob or a polyline grob. grid.lines
returns a lines grob invisibly.
Author(s)
Paul Murrell
See Also
Examples
grid.lines() # Using id (NOTE: locations are not in consecutive blocks) grid.newpage() grid.polyline(x=c((0:4)/10, rep(.5, 5), (10:6)/10, rep(.5, 5)), y=c(rep(.5, 5), (10:6/10), rep(.5, 5), (0:4)/10), id=rep(1:5, 4), gp=gpar(col=1:5, lwd=3)) # Using id.lengths grid.newpage() grid.polyline(x=outer(c(0, .5, 1, .5), 5:1/5), y=outer(c(.5, 1, .5, 0), 5:1/5), id.lengths=rep(4, 5), gp=gpar(col=1:5, lwd=3))
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.