Query, set or reset options specific to the surveillance
package, similar to what
options does for global settings.
Either empty, or a sequence of option names (as strings),
or a sequence of
name=value pairs, or a named list of
options. Available options are:
Logical flag indicating whether gpclib, the General
Polygon Clipping Library for R, which has a restricted license
(commercial use prohibited),
may be used. This is no longer required since package
surveillance has switched to alternatives such as
polyclip and rgeos for generating
intersectPolyCircle.gpc.poly, using gpclib
is still an option (mainly for backwards compatibility).
The default setting is
A named list containing plotting color defaults.
Color of the "now" symbol in
Color of the prediction interval bars in
Logical flag queried before running cumbersome computations in
help file examples. For
this option defaults to
TRUE. Otherwise, long examples
will only be run if the environment variable
_R_SURVEILLANCE_ALL_EXAMPLES_ is set (to any value different
"") when attaching the surveillance package.
This is to avoid long computations during (daily) CRAN checks.
reset.surveillance.options reverts all options to their default
values and (invisibly) returns these in a list.
surveillance.options, the following holds:
If no arguments are given, the current values of all package options are returned in a list.
If one option name is given, the current value of this option is returned (not in a list, just the value).
If several option names are given, the current values of these options are returned in a list.
name=value pairs are given, the named options
are set to the given values, and the previous values of
these options are returned in a list.