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. This is most useful
for producing a postscript copy from an on-screen device.
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.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 |
dev.copy
returns the name and number of the device which has
been copied to.
dev.print
returns the name and number of the device which has
been copied from.
Every device has a display list which records all of the graphics
operations that occur in the device. dev.copy
and
dev.print
copy 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) dev.off(dev.prev()) dev.off()