[R] gam questions

[Prof Brian Ripley]

On Tue, 3 Jun 2003, Henric Nilsson wrote:

> I'm a fairly new R user having two questions regarding gam:
> 
> 1. The prediction example on p. 38 in the mgcv manual. 

That's not very helpful: pagination of manuals depends on the paper size, 
for example.

> In order to get 
> predictions based on the original data set, by leaving out the 'newdata' 
> argument ("newd" in the example), I get an error message
> 
> "Warning message: the condition has length > 1 and only the first element 
> will be used in: if (object$dim == 0) m <- 0 else m <- length(object$sp)"
> 
> I suspected that it had somthing to do with the data not being attached, 
> but when fitting a gam with an attached data set I got the same error. Why?

That is a warning not an error!  It was a bug in mgcv a while back.
Do you have the latest version of mgcv (and of R, for that matter)?
I am not seeing this any more.

-- 
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