Test if the current graphics device (or that which would be opened) is interactive.
dev.interactive(orNone = FALSE) deviceIsInteractive(name = NULL)
windows (Windows) and
quartz (OS X, on-screen types only) are regarded as interactive, together with
JavaGD (from the package of the same name) and
CairoX11 (from package Cairo). Packages can add their devices to the list by calling
dev.interactive() returns a logical,
TRUE if and only if an interactive (screen) device is in use.
deviceIsInteractive returns the updated list of known interactive devices, invisibly unless
name = NULL.
Devices for the available devices on your platform.
Documentation reproduced from R 3.0.1. License: GPL-2.