variances {modalclust} | R Documentation |
Affymetrix provides test data containing 24 samples from their Human Genome U133 microarray having 22,277 probesets (simply called "genes" below). The data is background-corrected and normalized using the Robust Multichip Averaging (RMA) method of Irizarry et al. (2003) as implemented in the "affy" package of BioConductor. This multivariate data with n=24 samples on G=22,277 genes was reduced to the sample variances contained in this dataset.
variances
A numeric vector giving the univariate sample variances described above.
Affymetrix Human Genome U133 Array Plate Set - Sample Data Set http://www.affymetrix.com/support/technical/sample_data/hgu133_arrayplateset_data.affx.
Irizarry, R., Hobbs, B., Collin, F., Beazer-Barclay, Y., Antonellis, K., Scherf, U., and Speed, T. (2003), "Exploration, Normalization, and Summaries of High Density Oligonucleotide Array Probe Level Data," Biostatistics, 4, 249-264.