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I have never heard of an "r-readable table". I used Google to search for it and got nothing helpful. In fact the page on this site is the first hit. It appears on this page http://www.broadinstitute.org/gatk/gatkdocs/org_broadinstitute_sting_gatk_walkers_coverage_DepthOfCoverage.html in the "DepthOfCoverage specific arguments" table, under "Summary" for "--outputFormat".
Could you please tell me what an "r-readable table" is? Thanks.