Linux下的awk文本分析命令實例(二)

awk實現求和、平均、最大值和最小值的計算操做

準備和數據文件

[finance@master2-dev ~]$ cat data.txt 
490898 
1189235 
20212 
1494270 
146515 
29369 
23563 
563027 
22976 
127809 
16813 
551646 
18858 
18977

求和

[finance@master2-dev ~]$ cat data.txt|awk '{sum+=$1} END {print "Sum = ", sum}'
Sum =  4714168

求平均

[finance@master2-dev ~]$ awk '{sum+=$1} END {print "Average = ", sum/NR}' data.txt 
Average =  336726

求最大值

[finance@master2-dev ~]$ awk 'BEGIN {max = 0} {if ($1>max) max=$1 fi} END {print "Max=", max}' data.txt 
Max= 563027

求最小值（min的初始值設置一個超大數便可）

[finance@master2-dev ~]$ awk 'BEGIN {min = 1999999} {if ($1<min) min=$1 fi} END {print "Min=", min}' data.txt 
Min= 1189235

最大最小值注意linux系統下比較的方法