Reshape is an R package for flexibly restructuring and aggregating
data. It's inspired by Excel's pivot tables, and it (hopefully) makes
it very easy to get your data into the shape that you want. You can find out
more at http://had.co.nz/reshape
What's new in this version?
* a new function, stamp, which is kind of a cross between by and
cast, and allows for aggregation functions that take an entire data
frame. See ?stamp for examples
* deals better with row and column names when subsetting the result
* a namespace to make it easier to deal with potential name clashes
with other packages
* better performance
Please let me know if you have any comments or questions.