liply

Because iterators do not have known length, <code>liply</code> starts by
allocating an output list of length 50, and then doubles that length
whenever it runs out of space. This gives O(n ln n) performance rather
than the O(n ^ 2) performance from the naive strategy of growing the list
each time.

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

liply function

<dl><dt>.iterator</dt>
<dd>iterator object</dd>
<dt>.fun</dt>
<dd>function to apply to each piece</dd>
<dt>...</dt>
<dd>other arguments passed on to <code>.fun</code></dd></dl>

Arguments

Deprecated, do not use in new code.

Warning

Experimental iterator based version of llply. — liply

<dl>

<dt>.iterator</dt>
<dd>iterator object</dd>


<dt>.fun</dt>
<dd>function to apply to each piece</dd>


<dt>...</dt>
<dd>other arguments passed on to <code>.fun</code></dd>

</dl>

liply: Experimental iterator based version of llply.

Description

Usage

Arguments

Warning

See Also