Re: how to duplicate "columns" in a file

On 2013-05-16 20:17, [email protected] wrote:
> hope you can help me with how to duplicate "columns" in a file:
>  
> before:
>  
> aaa
> bbb
> ccc
>  
>  
> after:
>  
> aaa aaa
> bbb bbb
> ccc ccc

If that's all you want, it should be as simple as

  sed 's/.*/& &/' infile.txt > outfile.txt

If you have multiple columns and only want to delimit certain ones,
you'd have to provide more detail:  Are they tab-delimited vs.
space-delimited vs. comma-delimited?  Are fields quoted, and if so,
how?  Which columns need to be duplicated, and where do the
duplicated need to appear?

-tim