Turn Off All Graphics Devices
- DESCRIPTION:
 - 
Performs the wrapup action for all of the active graphics devices,
leaving S-PLUS with no active graphics devices.
 
- USAGE:
 - 
graphics.off()
 
- SIDE EFFECTS:
 - 
This function executes the wrapup action for all of the currently
active graphics device.
This is important for flushing buffers, etc.
After execution, S-PLUS is in the same state as when it is first started,
i.e., there are no active graphics devices.
 
- DETAILS:
 - 
This function iteratively calls dev.off, which performs the actual
shutdown action one device at a time.
 
- SEE ALSO:
 - 
dev.cur
,
Devices
.