get_hasse_diag

Returns the adjacency list of the Hasse diagram of a preference as an (n x 2) matrix. 
This is the transitive reduction of the preference relation.

Routines to select and visualize the maxima for a given strict
partial order. This especially includes the computation of the Pareto
frontier, also known as (Top-k) Skyline operator (see Börzsönyi, et al.
(2001) <doi:10.1109/ICDE.2001.914855>), and some generalizations
known as database preferences (see Kießling (2002)
<doi:10.1016/B978-155860869-6/50035-4>).

Patrick Roocks

rPref

Database Preferences and Skyline Computation

get_hasse_diag function

<dl><dt>df</dt>
<dd>A data frame.</dd>
<dt>pref</dt>
<dd>A preference on the columns of <code>df</code>, see <code>psel</code> for details.</dd></dl>

Arguments

Adjacency List of Hasse diagram — get_hasse_diag

<dl>

<dt>df</dt>
<dd>A data frame.</dd>


<dt>pref</dt>
<dd>A preference on the columns of <code>df</code>, see <code>psel</code> for details.</dd>

</dl>

get_hasse_diag: Adjacency List of Hasse diagram

Description

Usage

Arguments

Details

See Also

Examples