April 2019
Intermediate to advanced
214 pages
5h 57m
German
Content preview from Merkmalskonstruktion für Machine LearningBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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KAPITEL 5
Kategoriale Variablen: Eier zählen im Roboterzeitalter
Eine kategoriale Variable wird, wie der Name nahelegt, für die Darstellung von Kategorien oder Markierungen verwendet. Beispielsweise könnte eine kategoriale Variable Hauptstädte der Welt, die vier Jahreszeiten oder die Branche einer Firma (Öl, Reisen, Technik) beschreiben. Es gibt in einem realistischen Datensatz immer endlich viele Ausprägungen einer Kategorie. Sie lassen sich als Zahlen darstellen, aber im Gegensatz zu anderen numerischen Variablen können die Ausprägungen einer kategorialen Variablen nicht untereinander angeordnet werden. (Öl ist als Branche weder größer noch kleiner als Reisen.) Sie werden daher als ungeordnet bezeichnet.
Eine einfache Frage kann als Lackmustest ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.