[R] Regex question

[Andrej Kastrin]

jim holtman wrote:

> Is this what you want?
>  
> > result <- readLines('/tempxx.txt')
> > result
> [1] "*NEW RECORD" "*ID-001"     "*AB-text"    ""            "*NEW RECORD"
> [6] "*ID-002"     "*AB-text"  
> > result <- result[grep('^.ID-', result)] # select only ID lines
> > result
> [1] "*ID-001" "*ID-002"
> > sub('^.ID-', '', result)
> [1] "001" "002"
>
>
>  
> On 1/28/06, *Andrej Kastrin* <andrej.kastrin at siol.net 
> <mailto:andrej.kastrin at siol.net>> wrote:
>
>     Dear R useRs,
>
>     is there any simple, build in function to match specific regular
>     expression in data file and write it to a vector. I have the
>     following
>     text file:
>
>     *NEW RECORD
>     *ID-001
>     *AB-text
>
>     *NEW RECORD
>     *ID-002
>     *AB-text
>     etc.
>
>     Now I have to match all ID fields and print them to a vector:
>     001
>     002
>     etc.
>
>     I know that this is very simple with Perl or R-Perl interface, but if
>     possible, I want to do that 'on the hard way'.
>
>     Cheers, Andrej
>
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>
>
>
> -- 
> Jim Holtman
> Cincinnati, OH
> +1 513 247 0281
>
> What the problem you are trying to solve? 

I'm forever indepted to you for this.

Cheers, Andrej