These functions are deprecated and should not be used in new code.
Conveniently create plots with different layout and in different output formats (both on-screen and various graphics file formats).
Each plot is wrapped in a pair of zipfR.begin.plot and
zipfR.end.plot commands, which make sure that a suitable
plotting window / image file is opened and closed as required. Format
and dimensions of the plots are controlled by global settings made
with zipfR.par, but can be overridden in the
zipfR.begin.plot call.
zipfR.pick.device automatically selects a default device by
scanning the specified vector for strings of the form --pdf,
--eps, etc.
NB: These are advanced functions intended to make it easier
to produce plots in different formats. Most users will only need
the basic plotting functionalities provided by plot.tfl,
plot.spc and plot.vgc.
zipfR.pick.device(args=commandArgs())zipfR.begin.plot(device=zipfR.par("device"), filename="",
width=zipfR.par("width"), height=zipfR.par("height"),
bg=zipfR.par("bg"), pointsize=zipfR.par("pointsize"))
## plotting commands go here
zipfR.end.plot(shutdown=FALSE)
a character vector, which will be scanned for strings of
the form --pdf, --eps, etc. If args is not
specified, the command-line arguments supplied to R will be
examined.
name of plotting device to be used (see "Devices" below)
for graphics file devices, basename of the
output file. A suitable extension for the selected file format will
be added automatically to filename. This parameter is
ignored for screen devices.
width and height of the plotting window or image, in inches
background colour of the plotting window or image (use
"transparent" for images with transparent background)
default point size for text in the plot
if set to FALSE (the default), on-screen plot devices
will be kept open for re-use in the next plot. Specify shutdown=TRUE
to ensure that the screen device is closed after a series of related plots.
zipfR.begin.plot invisibly returns the ID of the active plot device.
Currently, the following devices are supported (and can be used in the
device argument).
Screen devices:
x11opens the default graphic device set by
getOption("device"). In an interactive R sessions,
this will usually be a suitable on-screen device.
quartzaccepted as an alias for x11 on
macOS platforms
Graphics file devices:
epsEncapsulated PostScript (EPS) output (using
postscript device with appropriate settings)
pdfPDF output
pngPNG bitmap file (may not be available on all platforms)
zipfR.begin.plot opens a new plotting window or image file of
the specified dimensions (width, height), using the
selected graphics device (device). Background colour
(bg) and default point size (pointsize) are set as
requested. Then, any global graphics parameter settings (defined with
the init.par option of zipfR.par) are applied.
See the zipfR.par manpage for the "factory default"
settings of these options.
zipfR.end.plot finalizes the current plot. For image file
devices, the device will be closed, writing the generated file to
disk. For screen devices, the plotting window remains visible until a
new plot is started (which will close and re-open the plotting
window).
The main purpose of the zipfR plotting utilities is to make it
easier to draw plots that are both shown on screen (for interactive
work) and saved to image files in various formats. If an R script
specifies filenames in all zipfR.begin.plot commands, a
single global parameter setting at the start of the script is
sufficient to switch from screen graphics to EPS files, or any other
supported file format.
On-screen plotting devices are platform-dependent, and there may be
different devices available depending on which version of R is used.
For this reason, zipfR.begin.plot no longer allows users to
pick an on-screen device explicitly, but rather opens a default device
with dev.new. Note that this default device may write
output to a graphics file, but is usually set to a suitable on-screen
device in an interactive R session. In any case, users can change the
default by setting options(device=...). For backwards-compatibility,
the device name x11 (and quartz on macOS is accepted
for the default graphics device.
The png bitmap device may not be available on all platforms,
and may also require access to an X server. Since the width and
height of a PNG device have to be specified in pixels rather than
inches, zipfR.begin.plot translates the width and
height settings, assuming a resolution of 150 dpi. Use of
the png device is strongly discouraged. A better way of
producing high-quality bitmaps is to generate EPS image (with the
eps device) and convert them to PNG or JPEG format with the
external pstoimg program (part of the latex2html
distribution).
zipfR.pick.device will issue a warning if multiple flags
matching supported graphics devices are found. However, it is not an
error to find no matching flag, and all unrecognized strings are
silently ignored.
Devices, dev.new, postscript,
pdf and png for more information about the
supported graphics devices
zipfR-specific plotting commands are plot.spc,
plot.spc and plot.vgc
# NOT RUN {
## these graphics parameters will be set for every new plot
zipfR.par(init.par=list(bg="lightblue", cex=1.3))
zipfR.par(width=12, height=9)
## will be shown on screen or saved to specified file, depending on
## selected device (eps -> "myplot.eps", pdf -> "myplot.pdf", etc.)
zipfR.begin.plot(filename="myplot")
plot.spc(Brown100k.spc)
zipfR.end.plot()
## By starting an R script "myplots.R" with this command, you can
## display plots on screen when stepping through the script in an
## interactive session, or save them to disk files in various
## graphics formats with "R --no-save --args --pdf < myplots.R" etc.
zipfR.pick.device()
# }
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