[BioC] adding channels to beadarray ExpressionSetIllumina class to log transform beadsummary data

[Abhineet Uppal [guest]]

Hello all,

 Thank you for your development of Bioconductor and the many useful packages. I am new to microarray analysis, and have been using beadarray to analyze some of our data after going through the vignette with several example datasets. The beadsummary files produced for our lab do not have a channel for the log2 transform of the data. Is there a way to add that channel in R? 
If not, is there a way place to add that data to the text files in Excel? 

Thank you for your assistance!

 -- output of sessionInfo(): 

R version 2.15.1 (2012-06-22)
Platform: i386-apple-darwin9.8.0/i386 (32-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] BiocInstaller_1.4.7 beadarray_2.6.0     ggplot2_0.9.1       Biobase_2.16.0      BiocGenerics_0.2.0 

loaded via a namespace (and not attached):
 [1] AnnotationDbi_1.18.1 BeadDataPackR_1.8.0  colorspace_1.1-1     DBI_0.2-5            dichromat_1.2-4     
 [6] digest_0.5.2         grid_2.15.1          IRanges_1.14.4       labeling_0.1         limma_3.12.1        
[11] MASS_7.3-19          memoise_0.1          munsell_0.3          plyr_1.7.1           proto_0.3-9.2       
[16] RColorBrewer_1.0-5   reshape2_1.2.1       RSQLite_0.11.1       scales_0.2.1         stats4_2.15.1       
[21] stringr_0.6          tools_2.15.1 

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