[R] g-inverse

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Nov 30 10:36:04 CET 2000


On Thu, 30 Nov 2000, Tapio Nummi wrote:

> Is there any routine to obtain a g-inverse
> of a matrix in R or S-PLUS?

A g-inverse is not, as far as I know, 100% uniquely defined.  However,
ginv in package MASS has the Moore-Penrose version.


-- 
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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