打印第二行的列

Question

请问这是怎么回事？

awk 'FRN == 2 {print $7,"\t",$9,"\t",$11}' input > out

输入为

56924.716851    0.003449                                                           
 word dog a house 1 ball     0.00679 +/-   0.00550 z  26800 points

我要打印：

 0.00679   0.00550   26800

Answer 1

将FRN替换为FNR或NR。

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请参阅：8 Powerful Awk Built-in Variables – FS, OFS, RS, ORS, NR, NF, FILENAME, FNR