[R] R equivalent of linux "cut", "paste", and "grep" ?

[Romain Francois]

Hi,

If you are on a linux system, you can use these linux commands through 
pipe.
Otherwise :
- perl would do a great job on this.
- if you are familiar enough with SQL syntax, you can use the 
development version of the sqldf package to work on csv files as if they 
were database tables. See example 8 in http://code.google.com/p/sqldf/

Cheers,

Romain

Ng Stanley wrote:
> Hi,
>
> What functions should I use in order to perform the following steps:
>
> 1) Load a particular column (e.g., column 5) from a csv file
> 2) Append the column 5 to another csv file
> 3) select those rows that match specific keywords in column 5
>   
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