August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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167
计算
在可视化计算编辑器中，首先需要选择你要执行的计算类型。可以在编辑器顶部的
下拉菜单中进行设置。
当选择固定
LOD
时，将看到这些选项：
Compute using
（计算使用）
选择要汇总的度量标准，以及你想汇总的方式。
Group by
（分组）
如果有的话，设置度量的分组。
将生成的值显示在可视化计算编辑器的左侧，右侧的框图展示了在
Group by
（分组）
列表中每个字段中找到的值的范围。一旦获得了所需的值，可单击
Done
（完成），
你将在数据集中看到一个包含这些值的新数据字段。
18.7
小结
对有些人来说，计算是数据准备的“毒药”；而对另一些人来说，计算是有趣的逻
辑智力题。无论属于哪一类，计算都是必须使用和理解的内容，以便能成功地完成
数据准备工作。计算对于清理数据、添加分析所需的列以及转换字段的数据类型至
关重要。
Prep Builder
中的自定义计算编辑器，对于
Tableau Desktop
用户来说，应
该是非常熟悉的，是会经常用到的工具。对于像
LOD
和排名计算这样概念上比较
复杂的计算，可视化计算编辑器可以帮助你更好地理解它们及其返回的结果。
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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.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.