June 2009
Beginner to intermediate
428 pages
9h 48m
German
Content preview from Data Mining mit Microsoft SQL Server
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4.2. Darstellung von Validierungsergebnissen
Dieser Abschnitt zeigt Möglichkeiten zur Darstellung der Ergebnisse, welche mit den im vorhergehenden Abschnitt besprochenen Validierungstechniken ermittelt wurden, auf.
4.2.1. Klassifikationsmatrix
Eine einfache Möglichkeit, das Ergebnis einer Validierung zu präsentieren, stellt die Klassifikationsmatrix (auch Konfusionsmatrix genannt) dar. Sie stellt die vorhergesagten Klassen den eigentlichen Klassen gegenüber. Ein Beispiel findet sich in Abbildung 4.1. Aus dieser Matrix geht hervor, dass in zehn Fällen die Klasse Ja sowie in zwölf Fällen die Klasse Nein korrekt vorhergesagt wurde. Allerdings wurde in zwei Fällen Ja vorhergesagt, obwohl die tatsächliche Klasse Nein war und in drei Fällen wurde ...
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