August 2017
Intermediate to advanced
274 pages
7h 44m
Chinese
Content preview from Python数据分析基础
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184
｜
第
6
章
脚本生成的条形图和箱线图如图
6-6
所示。你可以在
pandas
绘图文档（
http://Pandas.
pydata.org/Pandas-docs/stable/visualization.html
）中学习到创建和设置统计图表的更多信息。
图 6-6：
pandas
生成的并排放置的条形图和箱线图
6.3
ggplot
ggplot
是一个
Python
绘图包，它基于
R
语言的
ggplot2
包和图形语法。
ggplot
与其他绘
图包的关键区别是它的语法将数据与实际绘图明确地分离开来。为了对数据进行可视化表
示，
ggplot
提供了几种基本元素：几何对象、图形属性和标度。除此之外，为了进行更高
级的绘图，
ggplot
还提供一些附加元素：统计变换、坐标系、子窗口和可视化主题。要
想获得关于
ggplot
的详细信息，可以参考
Hadley Wickham
的著作《
ggplot2
：数据分析
与图形艺术（第
2
版）》，也可以参考
Leland Wilkinson
的著作：
Grammar of Graphics, 2nd
Edition
（
Springer
）。
Python
的
ggplot
库不像
R
语言的
ggplot2
库那样成熟，所以它不具备
ggplot2
的所有功
能，也就是说，它没有那么多的几何对象、统计变换和标度，也没有坐标系、注释和增强
功能。在与
ggplot
相关的包进行了升级与修改之后，使用
ggplot
也可能会遇到问题。例
图与图表
｜
185
如，有一次我使用
ggplot
创建直方图时就遇到了问题，因为
pandas
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