error in plot() with fGarch object from saved .RData file

"BGP" == "Brian G. Peterson" <brian at braverock.com>
on Tue, 28 Jul 2009 14:08:41 -0500

BGP> On Windows, R saves your workspace automagically on quitting
   BGP> in a file
   BGP> in the working directory called .RData
   BGP>
   BGP> if I have a garchFit object 'gf' it will plot correctly
   BGP> immediately
   BGP> after fitting.
   BGP>
   BGP> However, it will fail after reloading:
   BGP>
   BGP> > plot(gf)
   BGP> Error in as.double(y) :
   BGP> cannot coerce type 'S4' to vector of type 'double'

Hi Brian,

I suspect that you did not load 'fGarch' before trying to plot your
saved object 'gf'. You are thus missing plot,fGARCH-method and related
functions.

If you do not want your coworker to load the whole package, you could
include the missing method and functions in the saved workspace.

HTH
Yohan

PhD student
Swiss Federal Institute of Technology
Zurich

www.ethz.ch