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str.mpfr

Compactly Show STRucture of Rmpfr Number Object

Description

The str method for objects of class mpfr produces a bit more useful output than the default method str.default.

Usage

## S3 method for class 'mpfr'
str(object, nest.lev, internal = FALSE,
    give.head = TRUE, digits.d = 12, vec.len = NULL, drop0trailing=TRUE,
    width = getOption("width"), ...)

Arguments

object

an object of class mpfr.
nest.lev

for str(), typically only used when called by a higher level str().
internal

logical indicating if the low-level internal structure should be shown; if true (not by default), uses str(object@.Data).
give.head

logical indicating if the “header” should be printed.
digits.d

the number of digits to be used, will be passed formatMpfr() and hence NULL will use “as many as needed”, i.e. often too many. If this is a number, as per default, less digits will be used in case the precision (getPrec(object)) is smaller.
vec.len

the number of elements that will be shown. The default depends on the precision of object and width (since Rmpfr 0.6-0, it was 3 previously).
drop0trailing

logical, passed to formatMpfr() (with a different default here).
width

the (approximately) desired width of output, see options(width = .).
...

further arguments, passed to formatMpfr().

See Also

.mpfr2list() puts the internal structure into a list, and its help page documents many more (low level) utilities.

Examples

(x <- c(Const("pi", 64), mpfr(-2:2, 64)))
str(x)
str(list(pi = pi, x.mpfr = x))
str(x ^ 1000)
str(x ^ -1e4, digits=NULL) # full precision

str(x, internal = TRUE) # internal low-level (for experts)

uu <- Const("pi", 16)# unaccurate
str(uu) # very similar to just   'uu'
Rmpfr

R MPFR - Multiple Precision Floating-Point Reliable

v0.8-4
GPL (>= 2)
Authors
Martin Maechler [aut, cre] (<https://orcid.org/0000-0002-8685-9910>), Richard M. Heiberger [ctb] (formatHex(), *Bin, *Dec), John C. Nash [ctb] (hjkMpfr(), origin of unirootR()), Hans W. Borchers [ctb] (optimizeR(*, "GoldenRatio"); origin of hjkMpfr())
Initial release
2021-04-08

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