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http://www.r-project.org/ R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R. R is a free software environment for statistical computing and graphics. It compiles and runs on a wide variety of UNIX platforms, Windows and MacOS. R is a language and environment for statistical computing and graphics.
https://carmaweb.genome.tugraz.at/carma/ Comprehensive R based Microarray Analysis web service (CARMAweb) is a resource for the analyses of microarray data including data preprocessing, detection for differentially expressed genes, cluster analysis, and GO analysis. Calculations are performed in R using functions provided by BioConductor.
http://www.magma-fgcz.unizh.ch/pages/loginuser.jsf MAGMA can be used for the analyses of two-channel microarray experiments and computes genes with significant differential expression using R and Bioconductor. Automatically generated R-scripts are available for download.