Do anyone know why this error comes? EdgeR worked last time I tried. Error in mglmOneGroup(y$counts, offset = getOffset(y), dispersion = 0.05) : Did not find function ??.rowMeans?? -- output of sessionInfo(): R version 2.14.1 (2011-12-22) Platform: x86_64-pc-linux-gnu (64-bit) locale: [1] LC_CTYPE=nb_NO.UTF-8 LC_NUMERIC=C LC_TIME=nb_NO.UTF-8 [4] LC_COLLATE=nb_NO.UTF-8 LC_MONETARY=nb_NO.UTF-8 LC_MESSAGES=nb_NO.UTF-8 [7] LC_PAPER=C LC_NAME=C LC_ADDRESS=C [10] LC_TELEPHONE=C LC_MEASUREMENT=nb_NO.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] org.Mm.eg.db_2.6.4 RSQLite_0.11.2 DBI_0.2-5 AnnotationDbi_1.16.19 [5] Biobase_2.14.0 edgeR_3.0.2 limma_3.10.3 loaded via a namespace (and not attached): [1] IRanges_1.12.6 tools_2.14.1 -- Sent via the guest posting facility at bioconductor.org.