[R] [R-pkgs] Reshape package: new version 0.7

From: hadley wickham <h.wickham_at_gmail.com>
Date: Mon 07 Aug 2006 - 00:53:43 EST


Reshape 0.7


Reshape is an R package for flexibly restructuring and aggregating data. It is inspired by Excel's pivot tables, and it makes it very easy to view your data the way you want. The reshape package (along with ggplot) received the John Chambers Award for Statistical Computing. You can find out more at http://had.co.nz/reshape.

Reshape (hopefully) makes it easy to do what you have been struggling to do with tapply, by, aggregate, xtabs, apply and summarise. It is also useful for getting your data into the correct structure for lattice or ggplot plots.

This new version of reshape substantially expands the type of output you can cast into. You can now make nested lists, cast(m, a ~ b | c) or cast(m, a ~ b | c + d), and multidimensional arrays, cast(m, a ~ b ~ c) (or any combination of the two). See the examples in ?cast.

What else is new?:

All feedback is welcomed, and if you are struggling with reshaping your data and the reshape package isn't helping, please let me know.

Regards,

Hadley
http://had.co.nz/



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