如何在绘图中离线绘制垂直线？

Question

如何使用python在绘图中离线绘制垂直线？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line通过shape输入添加s 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)

会给你的

Answer 2

这是我的例子。最重要的指示是这个。

fig.add_trace(go.Scatter(x=[12, 12], y=[-300,300], mode="lines", name="SIGNAL"))

最重要的属性是MODE='LINES'。

实际上这个例子是关于 x=12 的线段

例子

    import pandas as pd
    import plotly.graph_objects as go
    import matplotlib.pyplot as plt
    import numpy as np
    import plotly.tools as tls




    df1 = pd.read_csv('./jnjw_f8.csv')



    layout = go.Layout(
    xaxis = go.layout.XAxis(
        tickmode = 'linear',
        tick0 = 1,
        dtick = 3
    ),
    yaxis = go.layout.YAxis(
        tickmode = 'linear',
        tick0 = -100,
        dtick = 3
    ))

    fig = go.Figure(layout = layout)

    fig.add_trace(go.Scatter(x = df1['x'], y = 
    df1['y1'],name='JNJW_sqrt'))
    fig.add_trace(go.Scatter(x=[12, 12], y=[-300,300], 
    mode="lines", name="SIGNAL"))


    fig.show()

也看这里。 如何用plotly绘制垂直线

Answer 3

Plotly.py 4.12（11/20 发布）实现了垂直和水平线的功能。它适用于 plotly express 和 graph 对象。见这里：https : //community.plotly.com/t/annoucing-plotly-py-4-12-horizo​​ntal-and-vertical-lines-and-rectangles/46783

简单的例子：

import plotly.express as px

df = px.data.stocks(indexed=True)
fig = px.line(df)
fig.add_vline(x='2018-09-24')
fig.show()