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apply() and relatives

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Donna H.
apply() and relatives

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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: do.call 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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Hobart R Users Group
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CSIRO Marine and Atmospheric Research, Castray Esplanade · Hobart