如何使用 Plotly Express 和 Plotly 隐藏图例

Question

我试图通过首先在 Plotly Express 中创建一个简单的条形图，然后用 Plotly 对其进行更新以对其进行优化来学习 Plotly。我想隐藏传说。

我试图通过隐藏图例来更新原始图形，但我无法让它工作。这是我的回溯错误。

还有我的代码

import plotly.plotly as py
import plotly.graph_objs as go
import plotly_express as px
import pandas as pd


df = pd.read_csv('C:/Users/Documents/Python/CKANMay.csv')

fig = px.bar(df, x="Publisher", y="Views", color="Publisher", barmode="overlay")

fig.update(fig, showlegend="false")

这就是图表现在带有图例的样子。基本上，我希望右边那个可怕的传说消失

Answer 1

try this:

my_data = [go.Bar( x = df.Publisher, y = df.Views)]
my_layout = go.Layout({"title": "Views by publisher",
                       "yaxis": {"title":"Views"},
                       "xaxis": {"title":"Publisher"},
                       "showlegend": False})

fig = go.Figure(data = my_data, layout = my_layout)

py.iplot(fig)

• the argument showlegend is part of layout object which you did not specify in your code
• The code may also work if you do not wrap the layout object my_layout inside a go.Layout(). It could work by simply keeping my_layout a dictionary
• as for plotly.express, try fig.update_layout(showlegend=False). All the arguments are the same. Accessing them varies slightly.

Hope it works for you.

Answer 2

您原始代码的问题在于fig.update()它不fig作为参数。那条线可能只是fig.update(layout_showlegend=False)

Answer 3

在 plotly 中创建图形后，要禁用图例，您可以使用以下命令：

fig.update_layout(showlegend=False)

对于高级用户：您还可以通过设置每个轨迹的 showlegend 属性来启用/禁用图中单个轨迹的图例。例如：

fig.add_trace(go.Scatter(
    x=[1, 2],
    y=[1, 2],
    showlegend=False))

您可以在此处查看示例：https : //plotly.com/python/legend/