Re: [Rd] printing of complex numbers in R-alpha

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Thu 21 Sep 2006 - 13:11:35 GMT

On Thu, 21 Sep 2006, Martin Maechler wrote:

>>>>>> "Robin" == Robin Hankin <r.hankin@noc.soton.ac.uk>
>>>>>> on Thu, 21 Sep 2006 08:05:24 +0100 writes:
>
> Robin> Hello everyone
> Robin> I am finding complex numbers to be printed oddly in R-alpha.
>
>
> >> 1e100+1e100i
> Robin> [1] 1e+100+1e+100i
> >> 1e100 + 1e44i
> Robin> [1] 1e+100+100000000000000008821361405306422640701865984i
> >> dput(1e100+1e44i)
> Robin> 1e+100+100000000000000008821361405306422640701865984i
> >>
>
> ouch, ouch!
>
> Robin> [same thing at home on a linux box]
>
>
> Robin> The first line is what I would expect, the second and third lines
> Robin> aren't:
> Robin> I would prefer "1e100+1e44i". Is this possible for R-2.4.0?
>
> It should.

I think the right answer is 1e100+0i: read what 'digits' means for complex numbers.

It's been there since 2.2.0.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Thu Sep 21 23:14:15 2006

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