删除分组 plotly express 条形图中的空条，使得每组条之间的视觉距离相等

Question

我正在尝试对条形图的轨迹进行分组，并在每组之间保持相同的距离。

import pandas as pd
import plotly.express as px

df = pd.DataFrame({
  "City": ["Toronto", "Toronto", "Toronto", "CPH", "CPH", "London", "London"],
  "Tower name": ["T1", "T2", "T3", "T4", "T5", "T6","T7"],
  "Height": [1.0, 1.5, 2.0, 3.0, 4.0, 2.0 ,5.0],
})

fig = px.bar(x=df['City'], y=df['Height'],color = df['Tower name'], color_discrete_sequence=['black'])
fig.update_layout(showlegend=False)
fig.update_layout(barmode='group')
fig.show()

结果如下图。

我想要的解决方案是这样的

我找到了 this thread 但该线程中的解决方案建议堆叠条形图，这在我的情况下是不可能的。

Answer 1

您可以使用多分类轴https://plotly.com/python/categorical-axes/#multicategorical-axes

go.Figure(go.Bar(x=df.loc[:,["City", "Tower name"]].T.values, y=df["Height"].values, marker_color="black"))

删除分组 plotly express 条形图中的空条，使得每组条之间的视觉距离相等

Remove empty bars in grouped plotly express bar chart, such that the visual distance between each group of bars is equal

python

charts

express

plotly