estrogen {factDesign} | R Documentation |
Gene expression levels for 500 genes from a 2x2 factorial experiment on MCF7 breast cancer cells using Affymetrix HGU95av2 arrays.
data(estrogen)
An exprSet with 500 genes, 8 samples, and 2 variables.
The factors in this experiment were estrogen (ES: P or A) and length of exposure (TIME: 10 or 48 hours). Gene expression values were estimated using the PM-only method in dChip after normalization using the Invariant Set Method (Li and Wong, 2001).
Scholtens et al. Analyzing Factorial Designed Microarray Experiments. Journal of Multivariate Analysis. To appear.
Li and Wong (2001). Model-based analysis of oligonucleotide arrays: Expression index computation and outlier detection. PNAS. 98:31-36.
data(estrogen) pData(estrogen) plot(exprs(estrogen)[1,])