xfig {grDevices} | R Documentation

## XFig Graphics Device

### Description

`xfig` starts the graphics device driver for producing XFig (version 3.2) graphics.

The auxiliary function `ps.options` can be used to set and view (if called without arguments) default values for the arguments to `xfig` and `postscript`.

### Usage

    xfig(file = if(onefile) "Rplots.fig" else "Rplot%03d.fig",
         onefile = FALSE, encoding = "none",
         paper = "default", horizontal = TRUE,
         width = 0, height = 0, family = "Helvetica",
         pointsize = 12, bg = "transparent", fg = "black",
         pagecentre = TRUE, defaultfont = FALSE, textspecial = FALSE)

### Arguments

`file` | a character string giving the name of the file. For use with `onefile = FALSE` give a C integer format such as `"Rplot%03d.fig"` (the default in that case). (See `postscript` for further details.)
`onefile` | logical: if true allow multiple figures in one file. If false, assume only one page per file and generate a file number containing the page number.
`encoding` | The encoding in which to write text strings. The default is not to re-encode. This can be any encoding recognized by `iconv`: in a Western UTF-8 locale you probably want to select an 8-bit encoding such as `latin1`, and in an East Asian locale an `EUC` encoding. If re-encoding fails, the text strings will be written in the current encoding with a warning.
`paper` | the size of paper region. The choices are `"A4"`, `"Letter"` and `"Legal"` (and these can be lowercase). A further choice is `"default"`, which is the default. If this is selected, the papersize is taken from the option `"papersize"` if that is set to a non-empty value, otherwise `"A4"`.
`horizontal` | the orientation of the printed image, a logical. Defaults to true, that is landscape orientation.
`width, height` | the width and height of the graphics region in inches. The default is to use the entire page less a 0.5 inch overall margin in each direction. (See `postscript` for further details.)
`family` | the font family to be used. This must be one of `"AvantGarde"`, `"Bookman"`, `"Courier"`, `"Helvetica"` (the default), `"Helvetica-Narrow"`, `"NewCenturySchoolbook"`, `"Palatino"` or `"Times"`. Any other value is replaced by `"Helvetica"`, with a warning.
`pointsize` | the default point size to be used.
`bg` | the initial background color to be used.
`fg` | the initial foreground color to be used.
`pagecentre` | logical: should the device region be centred on the page?
`defaultfont` | logical: should the device use xfig's default font?
`textspecial` | logical: should the device set the textspecial flag for all text elements. This is useful when generating pstex from xfig figures.

### Details

Although `xfig` can produce multiple plots in one file, the XFig format does not say how to separate or view them. So `onefile = FALSE` is the default.

The `file` argument is interpreted as a C integer format as used by `sprintf`, with integer argument the page number. The default gives files ‘Rplot001.fig’, ..., ‘Rplot999.fig’, ‘Rplot1000.fig’, ....

Line widths as controlled by `par(lwd =)` are in multiples of 5/6*1/72 inch. Multiples less than 1 are allowed. `pch = "."` with `cex = 1` corresponds to a square of side 1/72 inch.

Windows users can make use of WinFIG (http://www.schmidt-web-berlin.de/WinFIG.htm, shareware), or XFig under Cygwin.

### Conventions

This section describes the implementation of the conventions for graphics devices set out in the “R Internals Manual”.

- The default device size is the paper size with a 0.25 inch border on all sides.

- Font sizes are in big points.

- The default font family is Helvetica.

- Line widths are integers, multiples of 5/432 inch.

- Circle radii are multiples of 1/1200 inch.

- Colours are interpreted by the viewing/printing application.

### Note

Only some line textures (`0 <= lty < 4`) are used. Eventually this may be partially remedied, but the XFig file format does not allow as general line textures as the R model. Unimplemented line textures are displayed as dash-double-dotted.

There is a limit of 512 colours (plus white and black) per file.

### Author(s)

Brian Ripley. Support for `defaultFont` and `textSpecial` contributed by Sebastian Fischmeister.

### See Also

`Devices`, `postscript`, `ps.options`.

[Package grDevices version 3.6.0 Index]