4个常用的awk数值统计命令

求和
[root@114 ~]# cat data.log
1
2
3
6
7
[root@114 ~]# awk '{a+=$1}END{print a}' data.log
19
平均值
[root@114 ~]# awk '{a+=$1}END{print a/NR}' data.log
3.8

最大值
awk 'BEGIN{max=-1111111111}{if($2>max)max=$2}END{print max}' log.data 
7

最小值
[root@112 ~]# awk 'BEGIN{max=1111111111}{if($2<max)max=$2}END{print max}' log.data      
5

awk '{print $2}' log.data |python -c "import sys;nums=[int(i) for i in sys.stdin.readlines()];print max(nums) "
awk '{print $2}' log.data |python -c "import sys;nums=[int(i) for i in sys.stdin.readlines()];print min(nums) "
awk '{print $2}' log.data |python -c "import sys;nums=[int(i) for i in sys.stdin.readlines()];print sum(nums)/len(nums) "
awk '{print $2}' log.data |python -c "import sys;nums=[int(i) for i in sys.stdin.readlines()];print sum(nums)"