[BioC] maQualityPlots: cannot coerce type 'S4' to vector of type 'double'

[Saket Choudhary]

I am using arrayQuality and beta7 packages to get an overview of
Quality Analysis:

> library(arrayQuality)
> library(beta7)
Loading required package: marray
Loading required package: limma
> maQualityPlots(beta7)
Error in as.double(y) :
  cannot coerce type 'S4' to vector of type 'double'
>
> sessionInfo()
R version 3.0.2 (2013-09-25)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_IN       LC_NUMERIC=C         LC_TIME=en_IN
 [4] LC_COLLATE=en_IN     LC_MONETARY=en_IN    LC_MESSAGES=en_IN
 [7] LC_PAPER=en_IN       LC_NAME=C            LC_ADDRESS=C
[10] LC_TELEPHONE=C       LC_MEASUREMENT=en_IN LC_IDENTIFICATION=C

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

other attached packages:
[1] beta7_1.0.6         marray_1.40.0       limma_3.18.9
[4] arrayQuality_1.40.0

loaded via a namespace (and not attached):
[1] grid_3.0.2         gridBase_0.4-6     hexbin_1.26.3      lattice_0.20-24
[5] RColorBrewer_1.0-5