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 21
Pivot-Tabellen
Wir haben gesehen, wie man mit der groupby-Abstraktion Beziehungen in einer Datenmenge erkunden kann. Eine Pivot-Tabelle ermöglicht eine vergleichbare Operation, die häufig in Erscheinung tritt in Tabellenkalkulationen und anderen Programmen, die Tabellendaten auswerten. Eine Pivot-Tabelle nimmt als Eingabe einfache Spaltendaten entgegen und arrangiert die Einträge in einer zweidimensionalen Tabelle, die eine mehrdimensionale Zusammenfassung der Daten bereitstellt. Der Unterschied zwischen groupby und Pivot-Tabellen sorgt manchmal für Verwirrung – mir hilft es, sich Pivot-Tabellen im Wesentlichen als mehrdimensionale Versionen von groupby-Aggregationen vorzustellen. Es bleibt beim Aufteilen, Anwenden, Kombinieren, aber ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.