The tutorials/bioconductor manuals about edgeR suggest to remove those genes does not that have at least 1 read per million in at least 'n' samples ( n = smallest group of samples). But the DESeq tutorials available doesn't include this step. Should we remove those genes or keep them in the DESeq data analysis pipeline ? This step drastically reduces the number of genes.
For example this review paper suggest to filter genes in edgeR but does not talk anything about DESeq.