[R] restore NAs in residuals

[Prof Brian Ripley]

You need to use na.action=na.exclude, _and_ to use the proper extractor 
function residuals() rather than pick up a component of the fitted object 
by partial matching.

See ?residuals.lm and ?naresid

On Mon, 3 Dec 2007, rem la wrote:

> Dear All,
>
> I have two vectors:
>
> tt = c(6.87, 7.43, 6.4, 4.5, 5.5, 5.87, NA, NA, NA, 7.7)
> year = 1966:1975
>
> Residuals
>
> lm(tt~year)$res
>
> do not contain NAs for the three years of missing temperature tt. Is there a
> simple way to get these NAs back into the residual's vector?
>
> Thank you,
> Sorama

-- 
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