affy {spkTools} | R Documentation |
This is a SpikeInExpressionSet object containing the data from the Affymetrix HGU133A Spike-in Experiment.
data(affy)
It contains a matrix of expression values and a matrix of nominal concentrations.
For more information see Irizarry, R.A., et al. NAR (2003) http://www.biostat.jhsph.edu/~ririzarr/papers/index.html