| grid.xaxis {grid} | R Documentation |
These functions create and draw an x-axis.
grid.xaxis(at = NULL, label = TRUE, main = TRUE, name = NULL,
gp = gpar(), draw = TRUE, vp = NULL)
xaxisGrob(at = NULL, label = TRUE, main = TRUE, name = NULL,
gp = gpar(), vp = NULL)
at |
A numeric vector of x-value locations for the tick marks. |
label |
A logical value indicating whether to draw the labels on the tick marks. |
main |
A logical value indicating whether to draw the axis
at the bottom (TRUE) or at the top (FALSE) of the
viewport. |
name |
A character identifier. |
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. |
draw |
A logical value indicating whether graphics output should be produced. |
vp |
A Grid viewport obect (or NULL). |
Both functions create an xaxis grob (a graphical object describing an
xaxis), but only grid.xaxis
draws the xaxis (and then only if draw is TRUE).
An xaxis grob. grid.xaxis returns the value invisibly.
If the at slot of an xaxis grob is not NULL then
the xaxis will have the following children:
If the at slot is NULL then there are no children
and ticks are drawn based on the current viewport scale.
Paul Murrell