predicate-utils

is_empty

is_named

<ul>
<li><code>is_empty()</code> checks if a vector or list is empty.</li>
<li><code>is_missing()</code> checks if a vector or list contains missing values.</li>
<li><code>is_named()</code> checks if an object is named.</li>
<li><code>is_uuid()</code> checks if a string is a canonically formatted UUID that is
version 1 through 5 and is the appropriate Variant as per RFC4122.</li>
</ul>

A collection of classes that represent
archaeological data. This package provides a set of S4 classes that
represent different special types of matrix (absolute/relative
frequency, presence/absence data, co-occurrence matrix, etc.) upon
which package developers can build subclasses. It also provides a set
of generic methods (mutators and coercion mechanisms) and functions
(e.g. summary statistics, predicates). In addition, a few classes of
general interest (e.g. that represent stratigraphic relationships)
are implemented.

predicate-utils: Utility Predicates

Description

Usage

Arguments

Value

See Also