diff=`gawk -f checkgrad.awk $file |grep 'Largest abs(1-numerical/analytical)='|awk '{printf "%15.10f",$3}'`
gawk -f checkgrad.awk $file
diff=`gawk -f checkgrad.awk $file |grep 'Largest abs(1-numerical/analytical)='|awk '{printf "%15.10f",$3}'`
gawk -f checkgrad.awk $file