apply() and relatives

  • October 18, 2013 · 3:30 PM
  • CSIRO Freycinet Room

 A discussion of apply, tapply, lapply, sapply, mapply, rapply, aggregate, by, split, rowSums, etc.

(and if time permits those distant relatives who should best be left locked in dusty attics: and reshape)


No add on packages here, just straight R (though I may show some timing comparisons for the fun of it).

A BIG thanks to John for stepping in at short notice. 

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  • John M.

    Hi 'apply' attendees... Well done to one and all for sticking it out until 5pm on a Friday afternoon! For those interested, I've posted the html and Rpres files to the More/Files section of the Meetup site. You'll need a modern browser to view the talk in html, and the latest dev version of Rstudio for the Rpres file. See here for the latter:



    October 21, 2013

  • Donna H.

    Great and informative talk! Many thanks John. Sorry I didn't get to speak to everyone.

    October 18, 2013

  • Leon B.

    Hadley Wickham's 'plyr' is worth a look, if only to simplify the *apply zoo. Pity I can't make the meeting.

    October 17, 2013

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