Description Usage Arguments Value See Also Examples

`mpfrVersion()`

returns the version of the MPFR library which
Rmpfr is currently linked to.

`c(x,y,...)`

can be used to combine MPFR numbers in the
same way as regular numbers **IFF** the first argument `x`

is
of class `mpfr`

.

`mpfrIs0(.)`

uses the MPFR library in the documented way to
check if (a vector of) MPFR numbers are zero. It was called
`mpfr.is.0`

which is strongly deprecated now.

`.mpfr.is.whole(x)`

uses the MPFR library in the documented way to
check if (a vector of) MPFR numbers is integer *valued*. This is
equivalent to `x == round(x)`

, but *not* at all to
`is.integer(as(x, "numeric"))`

.

You should typically rather use (the `"mpfr"`

method of the
generic function) `is.whole(x)`

instead.
The former name `mpfr.is.integer`

is deprecated now.

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`x` |
an object of class |

`...` |
for |

`lag, differences` |
for |

`mpfrIs0`

returns a logical vector of length `length(x)`

with values `TRUE`

iff the corresponding `x[i]`

is an MPFR
representation of zero (`0`

).

Similarly, `.mpfr.is.whole`

and `is.whole`

return a
logical vector of length `length(x)`

.

`mpfrVersion`

returns an object of S3 class
`"numeric_version"`

, so it can be used in comparisons.

The other functions return MPFR number (vectors), i.e., extending
class `mpfr`

.

`str.mpfr`

for the `str`

method.
`erf`

for special mathematical functions on MPFR.

The class description `mpfr`

page mentions many
generic arithmetic and mathematical functions for which `"mpfr"`

methods are available.

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