Fits quantile normalization functions for the arrays in the data set.
# S3 method for AffymetrixCelFile
fitQuantileNormFcn(this, yTarget, subset=NULL, ..., spar=NULL, nknots=1024,
  verbose=FALSE)Returns a normalization function.
The target probe signals.
An optional numeric vector specifying the indices of the
     subset of probes to be used to fit the normalization function.
Control parameters passed to
     smooth.spline.
Not used.
See Verbose.
Henrik Bengtsson
For more information see AffymetrixCelFile.