[R] Transforming matrix
Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Apr 10 16:26:40 CEST 2003
On Thu, 10 Apr 2003, Ramon Diaz wrote:
> If you have your TRUE/FALSE values in m1, then do
> > mode(m1) <- "numeric".
> This is probably not the best way but it seems to work.
That maps TRUE to 1 and FALSE to 0, and I read the request as for the
ifelse(m1, 0, 1) is probably the most transparent way.
> On Thursday 10 April 2003 15:56, Ramzi Feghali wrote:
> > hi everybody,
> > anyone knows how we can transform a binary matrix with TRUE and FALSE to 0
> > and 1 without looping? Thx
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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