August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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46
｜
第
4
章
的类别级别。
Tableau Desktop
可以轻松地汇总这样的小型数据集。如果不需要从任
何其他表格中获取额外的数据，则本例中无须进一步的准备步骤。
4.5
小结
正如你所看到的，重组数据是一个需要掌握和练习的关键技能，因为它使我们的样
本数据集更容易分析。在进行数据形态处理时，必须注意确保没有在无意中造成重
复的记录或改变了某个度量的汇总数值。同时要记住，一个较长较“细”的数据集
并不总是我们的目的。要把握的几个关键要素是：
•
每个维度都有一个数据字段，最好包含一个单一的数据类型（比如字符串或日
期型）。
•
每项度量使用一列。
你的数据与这种结构匹配得越紧，就越容易进行灵活地分析，无论数据的主题是什
么。和之前一样，在重塑数据之前规划好操作步骤，会让这个过程变得更加容易。
随着以下章节的进展，将会了解到更多关于重塑数据集的重要性，以及这样做的技
术和策略，这将使分析变得更加容易。
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