文本文件中的平均 Row/Column 数据
Average Row/Column Data in a Text File
我需要对文本文件中一行中的三列数据进行平均。
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
$ cat test.txt | awk -v OFS='\t' 'NR==1{="NEWAVG"}; NR!=1{=(++)/3};{print [=10=]}'
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
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", [=10=],"NEWAVG"} NR>1 { printf "%s %7.2f\n", [=10=],(++)/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
我需要对文本文件中一行中的三列数据进行平均。
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
$ cat test.txt | awk -v OFS='\t' 'NR==1{="NEWAVG"}; NR!=1{=(++)/3};{print [=10=]}'
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
对列进行平均是微不足道的，您可以使用 printf:
$ awk 'NR==1 { printf "%s %8s\n", [=10=],"NEWAVG"} NR>1 { printf "%s %7.2f\n", [=10=],(++)/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