awk只适用于复制的数据，为什么？

Append multiple header information fields to file until next header found

awk的仅适用于数据复制我/粘贴到一个新的文件之后。如果我将head的输出转换为新文件，那么awk仍然不起作用。 awk仅在将文件复制/粘贴到新文件时才有效。

`head -40 file.csv > output.csv`

这是AWK：

`awk -F, '/"Serial No."/ {sn = $2} 
    /"Location:"/ {loc = $2} 
    /"([0-9]{1,2}\/){2}[0-9]{4} [0-9]{2}:[0-9]{2}"/ 
        {$0 = loc FS sn FS $0}1' file.csv>master1.csv`

如果我复制/粘贴数据，并将其与原始数据，输出指示在每一行有差别，但不说在哪里。如果你看一个头输出和复制/粘贴文件之间的差异，你可以：

`diff trap4_top.csv trap4_again.csv'

：

< 1,25c1,24 

< "Serial No.","0700000036022821" 

< "Location:","LS_trap_2c" 
< "High temperature limit (�C)",20 
< "Low temperature limit (�C)",0 
< "Date - Time","Temperature (�C)" 
< "5/28/2015 08:00",24.0 
< "5/28/2015 10:00",29.5 
< "5/28/2015 12:00",28.0 
< "5/28/2015 14:00",28.5 
< "5/28/2015 16:00",27.0 
< "5/28/2015 18:00",24.5 
< "5/28/2015 20:00",23.0 
< "5/28/2015 22:00",22.5 
< "5/29/2015 00:00",21.5 
< "5/29/2015 02:00",21.0 
< "5/29/2015 04:00",20.0 
< "5/29/2015 06:00",20.0 
< "5/29/2015 08:00",24.5 
< "5/29/2015 10:00",26.0 
< "5/29/2015 12:00",27.5 
< "5/29/2015 14:00",30.0 
< "5/29/2015 16:00",29.0 
< "5/29/2015 18:00",25.5 
< "5/29/2015 20:00",23.5 
< "5/29/2015 22:00",23.0 
--- 
> "Serial No.","0700000036022821" 
> "Location:","LS_trap_2c" 
> "High temperature limit (°C)",20 
> "Low temperature limit (°C)",0 
> "Date - Time","Temperature (°C)" 
> "5/28/2015 08:00",24.0 
> "5/28/2015 10:00",29.5 
> "5/28/2015 12:00",28.0 
> "5/28/2015 14:00",28.5 
> "5/28/2015 16:00",27.0 
> "5/28/2015 18:00",24.5 
> "5/28/2015 20:00",23.0 
> "5/28/2015 22:00",22.5 
> "5/29/2015 00:00",21.5 
> "5/29/2015 02:00",21.0 
> "5/29/2015 04:00",20.0 
> "5/29/2015 06:00",20.0 
> "5/29/2015 08:00",24.5 
> "5/29/2015 10:00",26.0 
> "5/29/2015 12:00",27.5 
> "5/29/2015 14:00",30.0 
> "5/29/2015 16:00",29.0 
> "5/29/2015 18:00",25.5 
> "5/29/2015 20:00",23.5`

我看到特殊字符的差异，但我不是，如果他们涉及到，或者到目前为止如何删除它们，除了复制/粘贴。

head trap4.csv | cat -vte

给出：

"Serial No.","0700000036022821"^M$ 
"Location:","LS_trap_2c"^M$ 
"High temperature limit (M-0C)",20^M$ 
"Low temperature limit (M-0C)",0^M$ 
"Date - Time","Temperature (M-0C)"^M$ 
"5/28/2015 08:00",24.0^M$ 
"5/28/2015 10:00",29.5^M$ 
"5/28/2015 12:00",28.0^M$ 
"5/28/2015 14:00",28.5^M$ 
"5/28/2015 16:00",27.0^M$

来源

2017-02-15 5r9n

显示输出| cat -vte' – anubhava

完成。它显示我怀疑是回车 – 5r9n

好的以便我怀疑输入文件具有DOS行结束即\r或^M（如上所示）。

应该转换输入文件到Unix的行结束运行：

dos2unix file.csv

否则，你可以这样做：`头FILE.CSV的

head -40 file.csv | sed 's/\r//' | awk ...

来源

2017-02-15 07:24:39 anubhava

非常感谢。我一整天都被困在这里。 – 5r9n

awk只适用于复制的数据，为什么？

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