I'm confused about what to do.
{{{
R = RealField(round(log2(10)*200))
len(str(R(pi)))
///
42
}}}
It would be nice if there was a SAGE way to easily get pi to say 200
binary places or 200 decimal places.
maybe:
pi.str(2,places=200)
On 4/17/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 4/17/07, Timothy Clemans <[EMAIL PROTECTED]> wrote:
> >
> > http://www.sagemath.org/hg/sage-main?f=258cf90b118f;file=sage/functions/constants.py
> >
> > "We can obtain floating point approximations to each of these constants
> > by coercing into the real field with given precision. For example, to
> > 200 decimal places we have the following: "
>
> That's a mistake in the documentation -- replace "decimal places" by
> "binary digits". To get n digits you need just over log_2(10) binary digits.
>
> >
> > I have done some tests. R = RealField(200); len(str(R(pi))) "is not around
> > 200"
> >
> >
> > {{{
> > R = RealField(100)
> > print len(str(R(pi)))
> > print len(str(R(e)))
> > R = RealField(200)
> > print len(str(R(pi)))
> > print len(str(R(e)))
> > R = RealField(300)
> > print len(str(R(pi)))
> > print len(str(R(e)))
> > R = RealField(400)
> > print len(str(R(pi)))
> > print len(str(R(e)))
> > ///
> > 30
> > 30
> > 60
> > 60
> > 91
> > 91
> > 121
> > 121
> > }}}
> >
> > So now how do I get the decimal expansion of say pi to 200 places?\
>
> >
>
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