我需要平均文本文件中连续三行数据。
数据:
VALID_TIME STN CDF05 CDF10 CDF20 CDF30 CDF40 CDF50 CDF60 CDF70 CDF80 CDF90 CDF95 MEAN SD
2015031018 KMGM 50.3 51.5 52.9 54.0 54.9 55.8 56.7 57.6 58.6 60.1 61.3 55.8 3.3
2015031106 KMGM 75.7 76.8 78.2 79.2 80.0 80.8 81.6 82.4 83.4 84.8 85.9 81.0 4.0
2015031118 KMGM 54.0 55.1 56.5 57.5 58.4 59.3 60.1 61.0 62.1 63.6 64.8 59.3 3.9
2015031206 KMGM 71.1 72.3 73.9 75.1 76.1 77.0 77.9 78.9 80.1 81.6 82.9 77.0 4.4
2015031218 KMGM 55.5 56.8 58.4 59.5 60.5 61.5 62.4 63.5 64.7 66.3 67.7 61.5 4.4
我对平均感兴趣的列是CDF80,CDF90和CDF95。结束格式应该是,例如:
VALID_TIME STN CDF05 CDF10 CDF20 CDF30 CDF40 CDF50 CDF60 CDF70 CDF80 CDF90 CDF95 MEAN NEWAVG
2015031018 KMGM 50.3 51.5 52.9 54.0 54.9 55.8 56.7 57.6 58.6 60.1 61.3 55.8 xx.x
2015031106 KMGM 75.7 76.8 78.2 79.2 80.0 80.8 81.6 82.4 83.4 84.8 85.9 81.0 xx.x
答案 0 :(得分:3)
$ cat test.txt | awk -v OFS='\t' 'NR==1{$16="NEWAVG"}; NR!=1{$16=($11+$12+$13)/3};{print $0}'
VALID_TIME STN CDF05 CDF10 CDF20 CDF30 CDF40 CDF50 CDF60 CDF70 CDF80 CDF90 CDF95 MEAN SD NEWAVG
2015031018 KMGM 50.3 51.5 52.9 54.0 54.9 55.8 56.7 57.6 58.6 60.1 61.3 55.8 3.3 60
2015031106 KMGM 75.7 76.8 78.2 79.2 80.0 80.8 81.6 82.4 83.4 84.8 85.9 81.0 4.0 84.7
2015031118 KMGM 54.0 55.1 56.5 57.5 58.4 59.3 60.1 61.0 62.1 63.6 64.8 59.3 3.9 63.5
2015031206 KMGM 71.1 72.3 73.9 75.1 76.1 77.0 77.9 78.9 80.1 81.6 82.9 77.0 4.4 81.5333
2015031218 KMGM 55.5 56.8 58.4 59.5 60.5 61.5 62.4 63.5 64.7 66.3 67.7 61.5 4.4 66.2333
答案 1 :(得分:2)
对列进行平均是微不足道的,您可以使用printf
保留大部分原始格式:
$ awk 'NR==1 { printf "%s %8s\n", $0,"NEWAVG"} NR>1 { printf "%s %7.2f\n", $0,($11+$12+$13)/3 }' /tmp/data
VALID_TIME STN CDF05 CDF10 CDF20 CDF30 CDF40 CDF50 CDF60 CDF70 CDF80 CDF90 CDF95 MEAN SD NEWAVG
2015031018 KMGM 50.3 51.5 52.9 54.0 54.9 55.8 56.7 57.6 58.6 60.1 61.3 55.8 3.3 60.00
2015031106 KMGM 75.7 76.8 78.2 79.2 80.0 80.8 81.6 82.4 83.4 84.8 85.9 81.0 4.0 84.70
2015031118 KMGM 54.0 55.1 56.5 57.5 58.4 59.3 60.1 61.0 62.1 63.6 64.8 59.3 3.9 63.50
2015031206 KMGM 71.1 72.3 73.9 75.1 76.1 77.0 77.9 78.9 80.1 81.6 82.9 77.0 4.4 81.53
2015031218 KMGM 55.5 56.8 58.4 59.5 60.5 61.5 62.4 63.5 64.7 66.3 67.7 61.5 4.4 66.23