| dev2 {base} | R Documentation |
dev.copy copies the graphics contents of the current device
to the device specified by which or to a new device which has
been created by the function specified by device (it is an
error to specify both which and device).
dev.print copies the graphics contents of the current device
to a new device which has been created by the function specified by
device and then shuts the new device. The default is to
produce and print a postscript copy.
dev.copy2eps is similar to dev.print but produces an
EPSF output file, in portrait orientation (horizontal = FALSE)
dev.control allows the user to control the recording of
graphics operations in a device. If displaylist is "inhibit"
then recording is turned off.
dev.copy(device, ..., which=dev.next()) dev.print(device=postscript, ...) dev.copy2eps(...) dev.control(displaylist)
device |
A device function (e.g., x11,
postscript, ...) |
... |
Arguments to the device function above.
For dev.print, this includes which and by default any
postscript arguments. |
which |
A device number specifying the device to copy to |
displaylist |
A character string |
For dev.copy2eps, width and height are taken
from the current device unless otherwise specified. If just one of
width and height is specified, the other is adjusted
to preserve the aspect ratio of the device being copied. The default
file name is Rplot.eps.
dev.print is most useful for producing a postscript print
(its default) when the following applies. Unless
file is specified, the plot will be printed. Unless
width, height and pointsize are specified
the plot dimensions will be taken from the current device, shrunk
if necessary to fit on the paper. (pointsize is rescaled if the
plot is shrunk.) If horizontal is not specified and the plot
can be printed at full size by switching its value this is done
instead of shrinking the plot region.
If dev.print is used with a specified device (even
postscript) it sets the width and height in the same way as
dev.copy2eps.
dev.copy returns the name and number of the device which has
been copied to.
dev.print and dev.copy2eps return the name and number of
the device which has been copied from.
Most devices (including all screen devices) have a display list
which records all of the graphics operations that occur in the device.
dev.copy copies graphics contents by copying the display list
from one device to another device. Also, automatic redrawing of
graphics contents following the resizing of a device depends on the
contents of the display list.
After the command dev.control("inhibit"), graphics operations
are not recorded in the display list so that dev.copy and
dev.print will not copy anything and the contents of a device
will not be redrawn automatically if the device is resized.
The recording of graphics operations is relatively expensive in
terms of memory so the command dev.control("inhibit") can be
useful if memory usage is an issue.
dev.cur and other dev.xxx functions
x11()
plot(rnorm(10), main="Plot 1")
dev.copy(device=x11)
mtext("Copy 1", 3)
dev.print(width=6, height=6, horizontal=FALSE) # prints it
dev.off(dev.prev())
dev.off()