python-3.x - 如何在离线绘图中绘制垂直线？

Question

如何使用 python 在离线绘图中绘制一条垂直线？我想在 x=20、x=40 和 x=60 处添加线，所有这些都在同一个图中。

def graph_contracts(self):
    trace1 = go.Scatter(
        x=np.array(range(len(all_prices))),
        y=np.array(all_prices), mode='markers', marker=dict(size=10, color='rgba(152, 0, 0, .8)'))
    data = [trace1]
    layout = go.Layout(title='Market Contracts by Period',
                       xaxis=dict(title='Contract #',
                                  titlefont=dict(family='Courier New, monospace', size=18, color='#7f7f7f')),
                       yaxis=dict(title='Prices ($)',
                                  titlefont=dict(family='Courier New, monospace', size=18, color='#7f7f7f')))
    fig = go.Figure(data=data, layout=layout)
    py.offline.plot(fig)

Answer 1

您可以添加 line s 通过 shape 在 layout ，例如

import plotly
plotly.offline.init_notebook_mode()
import random

x=[i for i in range(100)]
trace = plotly.graph_objs.Scatter(x=x,
                                  y=[random.random() for _ in x],
                                  mode='markers')
shapes = list()
for i in (20, 40, 60):
    shapes.append({'type': 'line',
                   'xref': 'x',
                   'yref': 'y',
                   'x0': i,
                   'y0': 0,
                   'x1': i,
                   'y1': 1})

layout = plotly.graph_objs.Layout(shapes=shapes)
fig = plotly.graph_objs.Figure(data=[trace],
                               layout=layout)
plotly.offline.plot(fig)

会给你