R help - Nov 2006 - How to find further informations on specific options?

Dear friends,
  When i read the R-help , i often find the following case:
e.g.:surf.gls(np, covmod, x, y, z, nx = 1000, ...)  #Package Spatial:

Arguments:

  covmod: function to evaluate covariance or correlation function
   *     ...: parameters for 'covmod'*

How should i find the further information on "*...: parameters for
'covmod'*" ?
 I use the ?covmod, but can't find the information.
Could anybody give me the general method to do so?
-- 
With Kind Regards,

oooO:::::::::
(..):::::::::
:\.(:::Oooo::
::\_)::(..)::
:::::::)./:::
::::::(_/::::
:::::::::::::
[***********************************************************************]
Zhi Jie,Zhang ,PHD
Tel:86-21-54237149   epistat@gmail.com
Dept. of Epidemiology,school of public health,Fudan University
Address:No. 138 Yi Xue Yuan Road,Shanghai,China
Postcode:200032
[***********************************************************************]
oooO:::::::::
(..):::::::::
:\.(:::Oooo::
::\_)::(..)::
:::::::)./:::
::::::(_/::::
:::::::::::::

	[[alternative HTML version deleted]]

On Wed, 1 Nov 2006, zhijie zhang wrote:
> Dear friends,
>   When i read the R-help , i often find the following case:
> e.g.:surf.gls(np, covmod, x, y, z, nx = 1000, ...)  #Package Spatial:
> 
> Arguments:
> 
>   covmod: function to evaluate covariance or correlation function
>    *     ...: parameters for 'covmod'*
> 
> How should i find the further information on "*...: parameters for
'covmod'*" ?
>  I use the ?covmod, but can't find the information.
> Could anybody give me the general method to do so?
The spatial package is documented in full in Venables & Ripley (2002)  
Modern Applied Statistics with S, Chapter 15, section 2, pp. 425-430 (in
the References section of the help page).  However, on ?surf.gls, the See
Also section provides links to help pages describing expcov, gaucov, and
sphercov, so looking at See Also seems to be the general method you need.
> 
-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no