python-3.x - 在 plotly 中为子图共享相同的图例

Question

我使用subplotsin plotly 在同一个图中创建了两个图。

import plotly.graph_objects as go
import numpy as np
import pandas as pd
from plotly.subplots import make_subplots

df = pd.DataFrame(np.random.randint(0, 100, size=(20, 5)), columns=list('tABCD'))
df2 = pd.DataFrame(np.random.randint(0, 100, size=(20, 5)), columns=list('tABCD'))

fig = go.Figure()
fig = make_subplots(rows=1, cols=2)

fig.add_trace(go.Scatter(
                x=df.t,
                y=df['A'],
                name="1",
                line_color='deepskyblue',
                opacity=0.8,
                legendgroup='group1'),
                row=1, col=1
                )

fig.add_trace(go.Scatter(
                x=df.t,
                y=df['B'],
                name="2",
                line_color='dimgray',
                opacity=0.8,
                legendgroup='group2'),
                row=1, col=1
                )

fig.add_trace(go.Scatter(
                x=df.t,
                y=df['C'],
                name="3",
                line_color='blue',
                opacity=0.8,
                legendgroup='group3'),
                row=1, col=1
                )

fig.add_trace(go.Scatter(
                x=df.t,
                y=df['D'],
                name="4",
                line_color='red',
                opacity=0.8,
                legendgroup='group4'),
                row=1, col=1
                )

fig.add_trace(go.Scatter(
                x=df2.t,
                y=df2['A'],
                name="1",
                line_color='deepskyblue',
                opacity=0.8,
                legendgroup='group1'),
                row=1, col=2
                )

fig.add_trace(go.Scatter(
                x=df2.t,
                y=df2['B'],
                name="2",
                line_color='dimgray',
                opacity=0.8,
                legendgroup='group2'),
                row=1, col=2
                )

fig.add_trace(go.Scatter(
                x=df2.t,
                y=df2['C'],
                name="3",
                line_color='blue',
                opacity=0.8,
                legendgroup='group3'),
                row=1, col=2
                )

fig.add_trace(go.Scatter(
                x=df2.t,
                y=df2['D'],
                name="4",
                line_color='red',
                opacity=0.8,
                legendgroup='group4'),
                row=1, col=2
                )

fig.write_html('ts.html', auto_open=True)

输出：

我想为两个子图分享​​相同的图例。所以，我尝试指定一个图例组（ref）。它有效，但出现重复的标签

有关如何删除重复项的任何建议都会有所帮助

Answer 1

添加showlegend = False访问 df2 的实例将删除重复的图例

fig.add_trace(go.Scatter(
                x=df2.t,
                y=df2['A'],
                name="1",
                line_color='deepskyblue',
                opacity=0.8,
                legendgroup='group1',
                showlegend=False),
                row=1, col=2
                )