empty

Empty if it's null or it has 0 rows or columns

internal

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

empty function

<dl><dt>df</dt>
<dd>data frame to check</dd></dl>

Arguments

Check if a data frame is empty. — empty

<dl>

<dt>df</dt>
<dd>data frame to check</dd>

</dl>

empty: Check if a data frame is empty.

Description

Usage

Arguments