August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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62
｜
第
7
章
7.1
我们的数字意味着什么
如果我们能只考虑
0
、
1
、
2
、
3
、
4
、
5
、
6
、
7
、
8
、
9
就好了。这些数字构成了在数
据分析中所使用的数值的基础，但在数据分析中要比这复杂得多。你的分析往往会
集中在关于数的问题上，比如：
•
我的总销售额是多少？
•
我们的组织中有多少员工在工作？
•
我们卖给了多少客户？
•
有多大百分比的供应商向我们开过账单？
正如前面几章所讨论的那样，我们通常把这些数字称为数据的度量标准。分析通常
会对这些数据进行比较，或按类别进行细分，以提供更多的背景信息。
7.2
数字的类型
有两种类型的数字：
整数
即没有小数点的数字，如
4
和
16874
。
小数
/
浮点数
有小数点的数字，如
3.1415
和
0.31
。
7.3
用作类别还是度量
数值数据通常被用作类别或度量，而不是度量标准。客户
ID
（标识符）是一个典型
的数值数据的例子，通常不希望简单地汇总并作为度量标准来处理。毕竟客户
ID
字
段的平均值不会有太大意义。
在某些情况下，数值数据可以在
Tableau Desktop
中作为类别或度量标准使用。例如，
年龄就可以同时作为这两种数据使用。
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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.