📅  最后修改于: 2020-11-29 07:04:05             🧑  作者: Mango
默认情况下,具有多个迹线的绘图图表会自动显示图例。如果只有一条迹线,则不会自动显示。要显示,请将Layout对象的showlegend参数设置为True。
layout = go.Layoyt(showlegend = True)
图例的默认标签为跟踪对象名称。要设置图例标签,请显式设置trace的name属性。
在以下示例中,绘制了两个具有name属性的散点迹线。
import numpy as np
import math #needed for definition of pi
xpoints = np.arange(0, math.pi*2, 0.05)
y1 = np.sin(xpoints)
y2 = np.cos(xpoints)
trace0 = go.Scatter(
x = xpoints,
y = y1,
name='Sine'
)
trace1 = go.Scatter(
x = xpoints,
y = y2,
name = 'cos'
)
data = [trace0, trace1]
layout = go.Layout(title = "Sine and cos", xaxis = {'title':'angle'}, yaxis = {'title':'value'})
fig = go.Figure(data = data, layout = layout)
iplot(fig)
该图显示如下-