[R] precision in operations
bates at stat.wisc.edu
Fri Nov 7 14:39:29 CET 2003
Jason Turner <jasont at indigoindustrial.co.nz> writes:
> javier garcia - CEBAS wrote:
> > Hi all;
> > could you remind me what is the function to change the precision of
> > the operations done in R? I can't remember nor find it.
> There isn't one. R does all its calculations with system defined
> double-precision or integers (on most platforms where R is used, these
> are both 32 bits). See help(is.single)
Usually the double-precision representation is 64 bits in memory and,
for the IA-32 processors (Intel and AMD x86 family), 80 bits in the
floating point registers.
Javier may be looking for
options(digits = nn)
where the default value of nn is 7.
If you want more precision in printed results try setting
options(digits = 12)
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