For RGList objects, separate panel
can be produced for different types of probes, as determined by the
signature(x = "list", data = "missing")
The method for list objects is intended
to work with lists of normalized data sets, as either
NChannelSet objects. This
method will produce separate panel displays for each normalized data
D. Sarkar, R. Parkin, S. Wyman, A. Bendoraite, C. Sather, J. Delrow, A. K. Godwin,
C. Drescher, W. Huber, R. Gentleman, and M. Tewari.
Quality assessment and data analysis for microRNA expression arrays.
Nucleic Acids Res, 37(2):e17, 2009.