has specified data input has specified data output implements has format specification is published by is executed in CEL binary format R data frame logitT The logitT library implements the Logit-t algorithm introduced in --A high performance test of differential gene expression for oligonucleotide arrays-- by William J Lemon, Sandya Liyanarachchi and Ming You for use with Affymetrix data stored in an AffyBatch object in R. http://bioconductor.org/packages/2.4/bioc/html/logitT.html Nandini Badarinarayan Logit-t algorithm 't-test' BioConductor Software R software CEL ASCII format differential expression analysis Bioconductor