Linux 如何使用 AWK 选择一些列？
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How to select some columns with AWK?
提问by mahmood
I want to select some columns in a file and run some command on it. so my script is this
我想在文件中选择一些列并在其上运行一些命令。所以我的脚本是这样的
awk '{print ,,,,,,,,,,,,,,,}' test.txt > outpot.txt
but this print it to another file and I tried to do this
但这将它打印到另一个文件，我试图这样做
awk '{print ,,,,,,,,,,,,,,}' test.txt | next commands
(This commands works fine! I did a mistake and I don't know how to remove this question)
（这个命令工作正常！我犯了一个错误，我不知道如何删除这个问题）
is it possible to make this command shorter like instead of writing all columns just write $1-7 && $9-15 && $19(but this is not really important I just wondered if it's possible). The main thing is to be able to choose that columns
是否可以使这个命令更短，而不是像写所有列那样写$1-7 && $9-15 && $19（但这并不重要，我只是想知道是否可能）。最主要的是能够选择那些列
采纳答案by jaypal singh
Updated based on glennHymanman'ssuggestion:
根据glennHymanman 的建议更新：
awk '{for (i=1;i<=NF;i++) if ((1<=i && i<=7) || (9<=i && i<=15) || i==19) printf("%s ", $i); print ""}' file
回答by anubhava
To answer one part of your question, in awk script you can do:
要回答您的问题的一部分，您可以在 awk 脚本中执行以下操作：
{
for (i=1; i<=7; i++)
print $i;
for (i=9; i<=15; i++)
print $i;
print ;
}
