x11 {base} | R Documentation

## X Window System Graphics

### Description

`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`.

### Usage

    X11(display = "", width = 7, height = 7, pointsize = 12,
        gamma = 1, colortype = getOption("X11colortype"),
        maxcubesize = 256)

### Arguments

`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.

### Details

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"`.

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"`.

### See Also

`Devices`.

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