idata.frame

An immutable data frame works like an ordinary data frame, except that when
you subset it, it returns a reference to the original data frame, not a
a copy. This makes subsetting substantially faster and has a big impact
when you are working with large datasets with many groups.

manip

A set of tools that solves a common set of problems: you need
to break a big problem down into manageable pieces, operate on each
piece and then put all the pieces back together.  For example, you
might want to fit a model to each spatial location or time point in
your study, summarise data by panels or collapse high-dimensional
arrays to simpler summary statistics. The development of 'plyr' has
been generously supported by 'Becton Dickinson'.

Hadley Wickham

plyr

Tools for Splitting, Applying and Combining Data

idata.frame function

<dl><dt>df</dt>
<dd>a data frame</dd></dl>

Arguments

Construct an immutable data frame. — idata.frame

<dl>

<dt>df</dt>
<dd>a data frame</dd>

</dl>

idata.frame: Construct an immutable data frame.

Description

Usage

Value

Arguments

Details

Examples