options {spam} | R Documentation |
Allow the user to set and examine a variety of options which affect the way in which R computes and displays sparse matrix results.
spam.options(...) spam.getOption(x)
... |
any options can be defined, using name = value or
by passing a list of such tagged values. However, only the ones
below are used in spam .
Further, spam.options('name') == spam.options()['name'] , see the example.
|
x |
a character string holding an option name. |
Invoking spam.options()
with no arguments returns a list with the
current values of the options. To access the value of a single option, one should
use spam.getOption("eps")
, e.g., rather than
spam.options("eps")
which is a list of length one.
Internally, the options are kept in the list .Spam
.
For spam.getOption
, the current value set for option x
, or
NULL
if the option is unset.
For spam.options()
, a list of all set options sorted by category. For
spam.options(name)
, a list of length one containing the set value,
or NULL
if it is unset. For uses setting one or more options,
a list with the previous values of the options changed (returned
invisibly).
A short description with the default values follows.
eps=.Machine$double.eps
:drop=FALSE
:drop
when subsettingprintsize=100
:imagesize=10000
:image
or display
. Larger matrices are represented
as dots only.trivalues=FALSE
:FALSE
) or the values themselves (TRUE
) when returning the
upper and lower triangular part of a matrix.cex=1200
:image
or display
.version
safemode=TRUE
:bcksl=TRUE
:
spam.options
is essentially identical to sm.options
.
print
,
display
, image
, upper.tri
,
etc.
op <- spam.options(); utils::str(op) smat <- diag.spam( 1:8) smat spam.options( printsize=49) smat