August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
Become 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,
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.
27
第
3
章
数据准备规划
通常所处的状况是，手头的数据不适合直接使用。这可能是因为你已经尝试分析它，
但在早期遇到了障碍。也许有多个数据字段包含信息，而你希望只有一个。也许你
正在分析的数据有空当。或者，要分析的数据也许来自多个数据源。
在明确了这种认识后，该怎么办？当只看到眼前的问题时，该如何制订解决方案？
本章推荐了一种分阶段的方法，帮助你规划数据准备，定义结果，并建立一个工作
流程来解决问题。建议框架所包含的四个阶段如下：
1
．
KYD
（
Know Your Data
，了解你的数据）。
2
．
确定所需状态。
3
．
确定从
KYD
到期望状态所需的转换。
4
．
构建工作流。
为了说明这个过程，我们将提供一个简单的示例数据集，来自
Chin & Beard Suds
公
司的一些销售数据（见图
3-1
）。
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.Julian F.
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.
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.Amir M.
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.