grid.xaxis
Draw an X-Axis
Description
These functions create and draw an x-axis.
Usage
grid.xaxis(at = NULL, label = TRUE, main = TRUE, edits = NULL, name = NULL, gp = gpar(), draw = TRUE, vp = NULL) xaxisGrob(at = NULL, label = TRUE, main = TRUE, edits = NULL, name = NULL, gp = gpar(), vp = NULL)
Arguments
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, or an expression or character vector which specify the labels to use. If not logical, must be the same length as the |
main | A logical value indicating whether to draw the axis at the bottom ( |
edits | A gEdit or gEditList containing edit operations to apply (to the children of the axis) when the axis is first created and during redrawing whenever |
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 |
Details
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
).
Value
An xaxis grob. grid.xaxis
returns the value invisibly.
Children
If the at
slot of an xaxis grob is not NULL
then the xaxis will have the following children:
- major
-
representing the line at the base of the tick marks.
- ticks
-
representing the tick marks.
- labels
-
representing the tick labels.
If the at
slot is NULL
then there are no children and ticks are drawn based on the current viewport scale.
Author(s)
Paul Murrell
See Also
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.