Re: [R] strsplit and sapply

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Fri, 11 Apr 2008 13:24:34 +0200

check this:

TEXT <- c("a", "bb;ccc", "dddd;eeeee;ffffff") SPLIT <- strsplit(TEXT, ";")
sapply(SPLIT, "[", 1)

I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium

Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


> Colleagues,
>
> I have some text:
> TEXT <- c("a", "bb;ccc", "dddd;eeeee;ffffff")
>
> I want to retrieve the portion of each element before the first
> semicolon. I can split each element using strsplit:
>
> SPLIT <- strsplit(TEXT, ";")
>
> This yields:
> > SPLIT
> [[1]]
> [1] "a"
>
> [[2]]
> [1] "bb" "ccc"
>
> [[3]]
> [1] "dddd" "eeeee" "ffffff"
>
> Now I need to access the [1] portions of [[n]] - ("a", "bb",
> "dddd"). I suspect that sapply is the correct tool here but the
> syntax eludes me. Can anyone direct me to the correct syntax?
>
> Dennis
>
>
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-866-PLessThan (1-866-753-7784)
> Fax: 1-415-564-2220
> www.PLessThan.com
>
>
> [[alternative HTML version deleted]]
>
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>

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri 11 Apr 2008 - 11:29:03 GMT

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