November 2023
Intermediate to advanced
576 pages
13h 30m
German
Content preview from Handbuch Data Science mit PythonBecome 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 17
Hierarchische Indizierung
Bislang haben wir uns vorwiegend auf ein- und zweidimensionale in Pandas-Series-bzw. DataFrame-Objekten gespeicherte Daten konzentriert. Oftmals ist es jedoch sinnvoll, einen Schritt weiterzugehen und höherdimensionale Daten zu speichern – d.h., die Daten besitzen mehr als einen oder zwei Schlüssel als Index. Frühe Pandas-Versionen boten Panel- und Panel4D-Objekte, die man sich als 3-D- oder 4-D-Pendants des 2-D-DataFrame vorstellen konnte, sie waren in der Praxis jedoch etwas unhandlich. Ein deutlich häufiger vorkommendes Muster für die Arbeit mit mehrdimensionalen Daten ist Verwendung der hierarchischen Indizierung (auch unter der Bezeichnung Multi-Indexing geläufig), um mehrere Levels innerhalb eines einzigen ...
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