August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.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.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.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.
｜
109
数据集采样
是否有采样样本，你都会输出整个数据集，所以在
Prep
中回答问题时，只需要在输
入步骤上切换到整个数据集即可。
12.6
小结
采样数据可以成为提高数据准备速度和敏捷性的有用技术。但任何方式的数据样本
事实上都不是整个数据集。为了产生可靠的分析结果，确实需要尽可能地使用完整
的数据集，并将其提供给你的用户。这样，就可以发现样本数据可能无法揭示的异
常值和模式。
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