mgcv summary.gam

Hi Greg

> hi
 >
 > I'm trying to understand (a little) the code behind summary.gam, and have
 > the Biometrika article referred to in the Help. But am stuck early on.
 >
 > In the code, starting at line 167:
 >
 > if (est.disp)
 >    rdf <- residual.df
 > else rdf <- -1
 > res <- testStat(p, Xt, V, df[i], type = p.type,
 >    res.df = rdf)
 >
 > 1) shouldn't there be some brackets in the if else statement?
- I don't think so. rdf is either the residual degrees of freedom used 
to compute the scale parameter estimate or a signal of fixed scale 
parameter, to be passed to testStat.

 > 2) what is testStat?
mgcv:::testStat
- probably worth looking at the original source code which includes some 
comments. It does the actual computation.

best,
Simon

 > thanks
 >
 > Greg
 >
 >
 >
 >


-- 
Simon Wood, Mathematical Science, University of Bath BA2 7AY UK
+44 (0)1225 386603               http://people.bath.ac.uk/sw283 On

Simon Wood, Mathematical Science, University of Bath BA2 7AY UK
+44 (0)1225 386603               http://people.bath.ac.uk/sw283