| x11 {grDevices} | R Documentation |
X11 starts a graphics device driver for the X Window System
(version 11). This can only be done on machines that run X.
x11 is recognized as a synonym for X11.
X11(display = "", width = 7, height = 7, pointsize = 12,
gamma = 1, colortype = getOption("X11colortype"),
maxcubesize = 256, bg = "transparent", canvas = "white",
fonts = getOption("X11fonts"))
display |
the display on which the graphics window will appear.
The default is to use the value in the user's environment variable
DISPLAY. |
width |
the width of the plotting window in inches. |
height |
the height of the plotting window in inches. |
pointsize |
the default pointsize to be used. |
gamma |
the gamma correction factor. This value is used to ensure that the colors displayed are linearly related to RGB values. A value of around 0.5 is appropriate for many PC displays. A value of 1.0 (no correction) is usually appropriate for high-end displays or Macintoshs. |
colortype |
the kind of color model to be used. The
possibilities are "mono", "gray", "pseudo",
"pseudo.cube" and "true". Ignored if an X11 is
already open. |
maxcubesize |
can be used to limit the size of color cube allocated for pseudocolor devices. |
bg |
color. The default background color. |
canvas |
color. The color of the canvas, which is visible only when the background color is transparent. |
fonts |
X11 font description strings into which weight, slant and size will be substituted. There are two, the first for fonts 1 to 4 and the second for font 5, the symbol font. |
By default, an X11 device will use the best color rendering
strategy that it can. The choice can be overriden with the
colortype parameter. A value of "mono" results in
black and white graphics, "gray" in grayscale and
"true" in truecolor graphics (if this is possible). The
values "pseudo" and "pseudo.cube" provide color
strategies for pseudocolor displays. The first strategy provides
on-demand color allocation which produces exact colors until
the color resources of the display are exhausted. The second
causes a standard color cube to be set up, and requested colors
are approximated by the closest value in the cube. The default
strategy for pseudocolor displays is "pseudo".
An initial/default font family for the device can be specified via
the fonts argument, but
if a device-independent R graphics font family is specified
(e.g., via par(family=) in the graphics package),
the X11 device makes use of the X11 font database
(see X11Fonts) to
convert the R graphics font family
to an X11-specific font family description.
Note: All X11 devices share a colortype which is
set by the first device to be opened. To change the colortype
you need to close all open X11 devices then open one
with the desired colortype.
With colortype equal to "pseudo.cube" or "gray"
successively smaller palettes are tried until one is completely
allocated. If allocation of the smallest attempt fails the device will
revert to "mono".
Line widths as controlled by par(lwd=) are in multiples of the
pixel size, and multiples < 1 are silently converted to 1.
pch="." with cex = 1 corresponds to a rectangle of sides
the larger of one pixel and 0.01 inch.