[R] engineering notation format
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Jul 7 08:51:48 CEST 2006
Both format and formatC (and sprintf) use C facilities for scientific
format. As far as I know C has no facilities for your desired format, so
you would need to write your own C code and interface to R.
On Thu, 6 Jul 2006, Walker, Sam wrote:
> How can I format numbers to engineering notation?
> That is, like scientific but where the exponent is always a multiple of
> Some examples:
> 1635 000 000 => 1.635E9
> 163 500 000 => 163.5E6
> 0.000 000 000 135 => 135E-9
> I've tried format and formatC but I couldn't get them to work they I
> Any help is greatly appreciated.
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Brian D. Ripley, ripley at 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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