[BioC] error using genefilter for ttest in Rv2.0.0

[Rahul Kakkar]

Thanks for the win32 build of genefilter for Rv2.0.  Have run into an 
error when using genefilter to run a t-test.  Error seems to indicate 
genefilter is nor recognizing format of eset.  Please advise.  Thanks 
again.

 > data
AffyBatch object
size of arrays=1164x1164 features (42346 kb)
cdf=HG-U133_Plus_2 (54675 affyids)
number of samples=4
number of genes=54675
annotation=hgu133plus2

 > eset<-rma(data)

Attaching package 'hgu133plus2cdf':


         The following object(s) are masked from package:hgu133a2cdf :

          i2xy xy2i

Background correcting
Normalizing
Calculating Expression

 > eset
Expression Set (exprSet) with
         54675 genes
         4 samples
                  phenoData object with 2 variables and 4 cases
          varLabels
                 Covar1: mutant
                 Covar2: wt

 > tf1<-ttest(eset$mutant, p=.001)
 > ff2<-filterfun(tf1)
 > wh2<-genefilter(exprs(eset), ff2)
Error in model.frame(formula, rownames, variables, varnames, extras, 
extranames,  :
         invalid variable type
In addition: Warning message:
is.na() applied to non-(list or vector) in: is.na(m)
 >