awk学习

• 求和

    cat data|awk '{sum+=$1} END {print "Sum = ", sum}'

• 求平均

    cat data|awk '{sum+=$1} END {print "Average = ", sum/NR}'

• 求最大值

  cat data|awk 'BEGIN {max = 0} {if ($1>max) max=$1 fi} END {print "Max=", max}'

• 求最小值(min的初始值设置一个超大数即可)

  awk 'BEGIN {min = 1999999} {if ($1<min) min=$1 fi} END {print "Min=", min}'