[seqfan] Re: Keyword:cons sequences in Maple

[Alonso Del Arte]

Reason I ask is because there seem to be some 300 entries in the OEIS using
digits and evalf but only recently has an objection been raised to that it
gives something like

1.414213562373...

rather than

1, 4, 1, 4, 2, 1, 3, 5, 6, 2, 3, 7, 3, ...

Al


On Wed, Apr 9, 2014 at 7:30 AM, M. F. Hasler <seqfan at hasler.fr> wrote:

> The shortest direct implementation might be
> seq( `if`(c=".",NULL,parse(c)), c=convert( evalf[N](x) ,string))
>
> Maximilian
>
>
> On Tue, Apr 8, 2014 at 10:26 PM, <israel at math.ubc.ca> wrote:
> >
> > Actually, you can use RealDigits in the MmaTranslator[Mma] package:
> >
> >> MmaTranslator[Mma][RealDigits](evalf[100](sqrt(2)));
> >
> >
> > [[1, 4, 1, 4, 2, 1, 3, 5, 6, 2, 3, 7, 3, 0, 9, 5, 0, 4, 8, 8, 0, 1, 6,
> 8, 8, 7, 2, 4, 2, 0, 9, 6, 9, 8, 0, 7, 8, 5, 6, 9, 6, 7, 1, 8, 7, 5, 3, 7,
> 6, 9, 4, 8, 0, 7, 3, 1, 7, 6, 6, 7, 9, 7, 3, 7, 9, 9, 0, 7, 3, 2, 4, 7, 8,
> 4, 6, 2, 1, 0, 7, 0, 3, 8, 8, 5, 0, 3, 8, 7, 5, 3, 4, 3, 2, 7, 6, 4, 1, 5,
> 7, 3, 0, 0, 0, 0], 1]
> >
> > (Hmm: I don't know why it puts in those extra four 0's).
> >
> > Or you can do this:
> >>
> >> ListTools:-Reverse(convert(round(10^99*sqrt(2)),base,10));
> >
> >
> > [1, 4, 1, 4, 2, 1, 3, 5, 6, 2, 3, 7, 3, 0, 9, 5, 0, 4, 8, 8, 0, 1, 6, 8,
> 8, 7, 2, 4, 2, 0, 9, 6, 9, 8, 0, 7, 8, 5, 6, 9, 6, 7, 1, 8, 7, 5, 3, 7, 6,
> 9, 4, 8, 0, 7, 3, 1, 7, 6, 6, 7, 9, 7, 3, 7, 9, 9, 0, 7, 3, 2, 4, 7, 8, 4,
> 6, 2, 1, 0, 7, 0, 3, 8, 8, 5, 0, 3, 8, 7, 5, 3, 4, 3, 2, 7, 6, 4, 1, 5, 7,
> 3]
> >
> > Robert Israel
> > University of British Columbia and D-Wave Systems
> >
> >
> >
> > On Apr 8 2014, Alonso Del Arte wrote:
> >
> >> Is there a recommended way in Maple to compute keyword:cons sequences?
> Like
> >> for example 1/sqrt(2) ?
> >>
> >> (In Mathematica, that would be something like RealDigits[1/Sqrt[2] etc.)
> >>
> >> Al
> >>
> >>
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>



-- 
Alonso del Arte
Author at SmashWords.com<https://www.smashwords.com/profile/view/AlonsoDelarte>
Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>