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.
96
｜
第
11
章
出所有的异常值。虽然我们的眼睛是发现数据模式的神奇工具，但是为了让我们的
生活变得更轻松，在使用数据可视化技术寻找数据中的奇异值时，应该充分利用这
些软件工具。
图
11
-
3
：你能快速找到这张数据表格中的趋势吗？
为此，让我们使用
Prep Builder
内置的
Profile
（数据概况）窗格来帮助我们发现如
图
11-3
所示的
London Theatre Shows
（伦敦剧院演出）数据集中需要研究的东西。
11.3 Prep Builder
如何配置文件数据
当你将伦敦剧院演出数据集加载到
Prep Builder
中并添加
Clean
（清理）步骤时，
Prep Builder
会立即在
Profile
（概况）窗格中可视化数据概况（见图
11-4
）。
当你输入较大的数据源时，
Prep
会自动对数据进行采样，以帮助提高其响应
时间。
Prep
使用的算法旨在维护数据集的概况。采样的内容将在第
12
章进
一步介绍。
｜
97
数据概要分析
图
11
-
4
：从图
11
-
3
加载数据的 Prep Builder 的 Profile（概况）窗格
虽然它在表格格式上看起来是一个相对简单的数据集，但概况窗格表明，实际上它
包含了很多变化。在评估这个特定的数据集之前，让我们进一步挖掘
Prep Builder
中概况窗格内发生的事情。
11.3.1 ...
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.