One-liners

You have a genome coverage file in bedgraph format (final, fourth column is the coverage for a particular section) amd would like to find the max value:

awk '{if($4>mxc) mxc=$4} END {print mxc}' v30chronly_s.cov

A genome coverage file what is the average coverage per base?

awk '{tot=tot+$4/($3-$2); la=$3} END {print tot/la}' v30chronly_s.cov