awk：输出文件的文件名中包含^ M个字符

Question

I have a very long file which looks like this:

0a
190  0.121212
191  0.232323
...
0b
190  0.1212
191  0.4545
...
16c
190  0.34654
191  0.567565
...

I use awk to split the file into many smaller files using this command:

awk '/[0-9][a-c]/{close(x); x=$0;}{print > x;}' spectrum.tsv

This works, but the names of the output files all seem to contain a newline character at the end of the filename:

I have tried to remove the newline character with "sub" like so:

awk '/[0-9][a-c]/{close(x); x=$0;}{sub(/^M/,"",x)}{print > x;}' spectrum.tsv 

But that leads to the same result.

So my question is, how can I avoid the newline character in the output filenames? I am working on OSX 10.10 btw. The input file is from a Windows machine.

Answer 1

Run dos2unix on your files before you let awk process them! It will remove DOS style line endings, which is probably what is causing your head ache.

Answer 2

You can just set an appropriate record separator in awk to take care of \\r in input files:

awk -v RS='\r?\n' '/[0-9][a-c]/{close(x); x=$0;}{print > x;}' spectrum.tsv

Here RS='\\r?\\n' sets RS as optional \\r ( ^M ) followed by \\n

Answer 3

在vi编辑器中打开并进入命令模式，然后：输入":%s/[CTRL+V][CTRL+M]//g"