awk - 在特定时间戳之后开始数据整理

Question

我有几个用逗号分隔的 26 列文件。有几百行。每行在第三列都有一个时间戳。我想在下午 6 点时间戳之后开始对所有文件中的列进行平均，并将平均数据复制到一个新文件中。其中两行如下所示。日期和时间用空格分隔。我可以使用 AWK 进行平均，它是下午 6 点之后的开始，这让我感到困惑。

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1,0102,3/1/2013 3:44:50 PM ,3586,20.88,20.51,0.36,0.0,2777,0.083,0.377,0.294,0.0,0.775,0.6,0.60,STABLE,0.01,0.01,0.812,0.812,989,713,755,553,799,
2,0102,3/1/2013 3:59:50 PM ,2727,20.91,20.63,0.28,0.0,2215,0.067,0.302,0.234,0.0,0.812,0.5,0.60,STABLE,0.05,0.06,0.000,0.812,2385,1713,1810,1270,1910,

Answer 1

像这样的东西？

BEGIN { 
 FS=","; 
 ok=0 
} 

$3~/[6,7,8,9,10,11]:[0-9]+:[0-9]+ PM/ { ok=1 } 

ok==1 { print }