May 23, 2012 · 7:00 PM
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Tim Hesterberg will be talking about the dataframe package.
This package contains replacements for the data frame creation and subscripting functions in R, that dramatically cut the number of copies of that R makes of the data, e.g. from four to one for as.data.frame(a vector), and from 10 to 3 for data.frame(a list). Naturally, this is faster. I'll give tips on how to improve your own code.
The aggregate package contains aggregation utilities, including improved versions of existing R functions, and new faster functions that drop down to C for speed.
This will be back in the Arnold building again, check the map:
Feel free to park in Visitor Parking
We will have the usual pizza and a donation jar for those interested in contributing.