[BioC] lumi: error when plotting CV for lumi expression set

Sebastien Gerega seb at gerega.net
Tue May 13 02:56:47 CEST 2008

I am getting the following error when trying to plot the coefficient of 
variance for a lumi expression et.
plot(x.lumi, what='cv')
Error in as.double(y) :
  cannot coerce type 'S4' to vector of type 'double'

I have not had any problems creating the other QC plots that are 
recommended in the vignette.
What could be causing this problem, or how can I diagnose it?

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