These functions provide control over multiple graphics devices.
dev.cur() dev.list() dev.next(which = dev.cur()) dev.prev(which = dev.cur()) dev.off(which = dev.cur()) dev.set(which = dev.next()) dev.new(...) graphics.off()
- An integer specifying a device number.
- arguments to be passed to the device selected.
Only one device is the ‘active’ device: this is the device in which all graphics operations occur. There is a
"null device" which is always open but is really a placeholder: any attempt to use it will open a new device specified by
Devices are associated with a name (e.g.,
"postscript") and a number in the range 1 to 63; the
"null device" is always device 1. Once a device has been opened the null device is not considered as a possible active device. There is a list of open devices, and this is considered as a circular list not including the null device.
dev.prev select the next open device in the appropriate direction, unless no device is open.
dev.off shuts down the specified (by default the current) device. If the current device is shut down and any other devices are open, the next open device is made current. It is an error to attempt to shut down device 1.
graphics.off() shuts down all open graphics devices. Normal termination of a session runs the internal equivalent of
dev.new opens a new device. Normally R will open a new device automatically when needed, but this enables you to open further devices in a platform-independent way. (For which device is used see
getOption("device").) Note that care is needed with file-based devices such as
postscript and in that case file names such as ‘Rplots.pdf’, ‘Rplots1.pdf’, ..., ‘Rplots999.pdf’ are tried in turn. Only named arguments are passed to the device, and then only if they match the argument list of the device. Even so, care is needed with the interpretation of e.g.
width, and for the standard bitmap devices
units = "in", res = 72 is forced if neither is supplied but both
dev.cur returns a length-one named integer vector giving the number and name of the active device, or 1, the null device, if none is active.
dev.off returns the number and name of the new active device (after the specified device has been shut down).
dev.set returns the number and name of the new active device.
dev.new returns the return value of the device opened, usually invisible
layout and its links for setting up plotting regions on the current device.
Documentation reproduced from R 2.15.3. License: GPL-2.