awk 'BEGIN { tot1 = 0; tot2 = 0; count = 0; sumsq1 = 0; sumsq2 = 0; } { tot1 = tot1 + $4; tot2 = tot2 + $5/62500; sumsq1 = sumsq1 + $4*$4; sumsq2 = sumsq + $5*$5; count = count+1; if (count == 10) { tot1 = tot1/10; tot2 = tot2/10; print $1,$2,tot1,tot2,3.322*log(tot2); count=0; tot1=0; sumsq = 0; } }' $1