传奇人物标题 [英] Plotly legend title

问题描述

我希望能够在以下代码中为图例添加标题.但是，查看文档，我认为没有解决方法

I'd like to be able to add a title to the legend, in the following code. However, looking at the docs, I don't think there is a method for this.

import plotly.plotly as py
import plotly.graph_objs as go

trace0 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[1, 2, 3, 4, 5],
)

trace1 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[5, 4, 3, 2, 1],
)

data = [trace0, trace1]
fig = go.Figure(data=data)

py.iplot(fig, filename='default-legend')

推荐答案

更新:

要定义图例而不具有注释位置，请使用以下代码.

For not defining the legend but having the annotation positioned property please use the below code.

import plotly.offline as py_offline
import plotly.graph_objs as go
py_offline.init_notebook_mode()

trace0 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[1, 2, 3, 4, 5],
)

trace1 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[5, 4, 3, 2, 1],
)

data = [trace0, trace1]
layout = go.Layout(
    annotations=[
        dict(
            x=1.12,
            y=1.05,
            align="right",
            valign="top",
            text='Legend Title',
            showarrow=False,
            xref="paper",
            yref="paper",
            xanchor="center",
            yanchor="top"
        )
    ]
)
fig = go.Figure(data=data, layout = layout)

py_offline.iplot(fig)

注释:

1. 您需要使用此方法为不同的图例定义注释的x和y位置.

您可以在text属性(例如:text='Legend Title<br>kinda lengthy',)

You can use html inside the text attribute(E.g: text='Legend Title<br>kinda lengthy',)

上次尝试:

另一种方法是创建图例并使用注释将标题添加到图例.前提是您未在可编辑模式下使用图形.因此，在下面的示例中，图例设置为x = 0和y = 1，因为我希望我的图例标题位于我的实际图例上方，所以我将注释位置设置为x = 0，y = 1.5. x-ref和y-ref需要设置为纸张.这会给一个很好的注解，例如

Another approach would to create the legend and use annotations to add the title to the legend. Provided you do not use the graph in editable mode. So in the below example, the legend is set to x=0 and y=1, since I want my legend title to be above my actual legend, I set the annotation location as x = 0, y= 1.5. x-ref and y-ref needs to be set to paper. This will give a nice annotation like

代码:

import plotly.plotly as py
import plotly.graph_objs as go

trace0 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[1, 2, 3, 4, 5],
)

trace1 = go.Scatter(
    x=[1, 2, 3, 4, 5],
    y=[5, 4, 3, 2, 1],
)

data = [trace0, trace1]
layout = go.Layout(
    legend=dict(
        x=0,
        y=1,
        traceorder='normal',
        font=dict(
            family='sans-serif',
            size=12,
            color='#000'
        ),
        bgcolor='#E2E2E2',
        bordercolor='#FFFFFF',
        borderwidth=2
    ),
    annotations=[
        dict(
            x=0,
            y=1.05,
            xref='paper',
            yref='paper',
            text='Legend Title',
            showarrow=False
        )
    ]
)
fig = go.Figure(data=data, layout = layout)

py.iplot(fig)

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