[R] non-negative least squares?

[Prof Brian Ripley]

On Fri, 16 Nov 2001, Robert Abugov wrote:

>
> In July of 1999 Douglas Bates invited R users to implement an algorithm for
> non-negative least squares based on Bates and Wolf, 1984: Communications in
> Statistics, Part B 13:841-850.
> <http://www.ens.gu.edu.au/robertk/R/help/99b/0058.html>
>
> I'm wondering if anybody has implemented this or something similar so I
> won't have to reinvent the wheel.

I just use optim() on the sum of squares with non-negativity constraints.
That did not exist in 1999.


-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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