iproto

This function is used internally for default values for a dataframe
parameter. It generates a zero length dataframe that conforms to a <code>iface</code>
specification, in terms of column names, data types and groupings. Such a
dataframe is not guaranteed to be fully conformant to the <code>iface</code>
specification if, for example, completeness constraints are applied.

A dataframe validation framework for package builders who use
dataframes as function parameters. It performs checks on column names, coerces
data-types, and checks grouping to make sure user inputs conform to a
specification provided by the package author. It provides a mechanism for
package authors to automatically document supported dataframe inputs and
selectively dispatch to functions depending on the format of a dataframe much
like S3 does for classes. It also contains some developer tools to make
working with and documenting dataframe specifications easier. It helps package
developers to improve their documentation and simplifies parameter validation
where dataframes are used as function parameters.

Robert Challen

interfacer

Define and Enforce Contracts for Dataframes as Function
Parameters

iproto function

<dl><dt>iface</dt>
<dd>the specification</dd></dl>

Arguments

Generate a zero length dataframe conforming to an iface specification — iproto

<dl>

<dt>iface</dt>
<dd>the specification</dd>

</dl>

iproto: Generate a zero length dataframe conforming to an `iface` specification

Description

Usage

Value

Arguments

Examples