Shell Programming and Scripting

filename:b

awk 'BEGIN{RS=","}
{
print 
}' b> c
sort -n c > c.t
rm c
sed '/^$/d' c.t > c
rm c.t
echo "min=`head -1 c`"
echo "max=`tail -1 c`"
echo "avg=`awk '{n=n+$0}END{print n/NR}' c`

awk -v RS="," '
   NF && min=="" {
      min = max = $1 ;
   }
   NF {
     if ($1 > max) max = $1;
     if ($1 < min) min = $1;
     sum += $1
     cnt += 1
   }
   END {
      print "minimum number:" min;
      print "maximum number:" max;
      print "average:" sum/cnt;
   }
    ' inputfile