spam (version 0.15-2)

options: Options Settings

Description

Allow the user to set and examine a variety of options which affect the way in which Rcomputes and displays sparse matrix results.

Usage

spam.options(...)
spam.getOption(x)

Arguments

...

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

x

a character string holding an option name.

Value

• 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).

Details

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.

See Also

print, display, image, upper.tri, chol, nearest.dist, etc.

Examples

op <- spam.options()

# two ways of representing the options nicely.
utils::str(op)
noquote(unlist(format(op)) )


smat <- diag.spam( 1:8)
smat
spam.options( printsize=49)
smat


# Reset to default values:
spam.options( eps=.Machine$double.eps, drop=FALSE,             
   printsize=100,  imagesize=10000,   cex=1200, 
   trivalues=FALSE,   safemode=c(TRUE,TRUE,TRUE), 
   dopivoting=TRUE,       cholsymmetrycheck=TRUE,  
   cholpivotcheck=TRUE, cholupdatesingular="warning",
   cholincreasefactor=c(1.25,1.25),
   nearestdistincreasefactor=1.25,
   nearestdistnnz=c(400^2,400)     )