pandas Seaborn FacetGrid 条形图和色调
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Seaborn FacetGrid barplots and hue
提问by plablo09
I have a DataFrame with the following structure:
我有一个具有以下结构的 DataFrame：
interval segment variable value
4 02:00:00 Night weekdays 154.866667
5 02:30:00 Night weekdays 100.666667
6 03:00:00 Night weekdays 75.400000
7 03:30:00 Night weekdays 56.533333
8 04:00:00 Night weekdays 55.000000
9 04:30:00 Night weekends 53.733333
10 05:00:00 Night weekends 81.200000
11 05:30:00 Night weekends 125.933333
14 07:00:00 Morning weekdays 447.200000
15 07:30:00 Morning weekends 545.200000
16 08:00:00 Morning weekends 668.733333
17 08:30:00 Morning weekends 751.333333
18 09:00:00 Morning weekdays 793.800000
19 09:30:00 Morning weekdays 781.125000
23 11:30:00 Noon weekdays 776.375000
24 12:00:00 Noon weekdays 741.812500
25 12:30:00 Noon weekends 723.000000
26 13:00:00 Noon weekends 734.562500
27 13:30:00 Noon weekends 763.882353
28 14:00:00 Afternoon weekdays 810.411765
31 15:30:00 Afternoon weekdays 855.411765
32 16:00:00 Afternoon weekdays 824.882353
33 16:30:00 Afternoon weekends 768.529412
34 17:00:00 Afternoon weekends 790.812500
35 17:30:00 Afternoon weekends 809.125000
I want to produce a faceted grid of bar plots, one for each variable (weekdays/weekends) and then colour the bars according to the "segment" column.
我想生成一个多面的条形图网格，每个变量（工作日/周末）一个，然后根据“段”列为条形着色。
Producing the two bar plots is very straightforward:
生成两个条形图非常简单：
g = sns.FacetGrid(melted, col="variable")
g.map(sns.barplot,'interval','value')
This produces (I know the xlabels are wrong, I can correct that):
这会产生（我知道 xlabels 是错误的，我可以更正）：
I'm stuck at colouring the bars according to "segment". Per the docs, all I need to do is add the variable when instantiating the FacetGrid and set some palette:
我一直坚持根据“细分”为条形着色。根据文档，我需要做的就是在实例化 FacetGrid 时添加变量并设置一些调色板：
g = sns.FacetGrid(melted, col="variable",hue="segment",palette="Set3")
g.map(sns.barplot,'interval','value')
But this produces:
但这会产生：
The bars are stacked in front of each other instead of being spread across the whole interval. What am I missing here?
酒吧在彼此的前面堆叠，而不是分布在整个间隔中。我在这里错过了什么？
I've created a gistwith the dataset.
我已经用数据集创建了一个要点。
回答by mwaskom
Because intervalis nested within the xvariable (segment), you need to tell barplotabout all of the possible levels of the xvariable, so that they are not drawn on top of each other:
因为interval嵌套在x变量 ( segment) 中，您需要告知变量的barplot所有可能级别x，以便它们不会相互叠加：
times = df.interval.unique()
g = sns.FacetGrid(df, row="variable", hue="segment",
palette="Set3", size=4, aspect=2)
g.map(sns.barplot, 'interval', 'value', order=times)
