在plotly python中自动测距y轴

如何解决在plotly python中自动测距y轴

我想以 plotly 绘制图形。使用 rangelider 设置缩放范围时，y 轴是固定的，并使数据平坦。我找到了一个专家做的页面，但我做不到

有没有人可以做到这一点

https://community.plotly.com/t/y-axis-autoscaling-with-x-range-sliders/10245/11

在这个页面上，第二张图是一个动画gif，这正是我要做的

解决方法

这是相同的技术，但使用破折号来捕获事件并触发回调。其他参考：graph slider as input

from jupyter_dash import JupyterDash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input,Output,State
import plotly.express as px
import numpy as np
import pandas as pd

# generate some data and a figure...
s = 500
df = pd.DataFrame({"date": pd.date_range("1-jan-2020",periods=s),"val": np.random.uniform(0,1,s)})
df = df.assign(val=df["val"] * (df["date"] - df["date"].min()).dt.days ** 3)

fig = px.line(df,x="date",y="val")
fig = fig.update_layout(xaxis={"rangeslider": {"visible": True},"range":[df["date"].quantile(.75),df["date"].max()]})

# Build App
app = JupyterDash(__name__)
app.layout = html.Div([
    dcc.Graph(id='dashFig',figure=fig),],style={"font-family": "Arial","font-size":"0.9em"})

# get callback from rangeslider and update ranges on x & y axis
@app.callback(Output('dashFig','figure'),[Input('dashFig','relayoutData')])
def rangesliderchg(relayoutData):
    if relayoutData and "xaxis.range" in relayoutData.keys():
        s = df.loc[df["date"].between(relayoutData['xaxis.range'][0],relayoutData['xaxis.range'][1]),"val"]
        fig["layout"]["yaxis"]["range"] = [s.min(),s.max()]
        fig["layout"]["xaxis"]["range"] = relayoutData['xaxis.range']
    return fig

# Run app and display result inline in the notebook
app.run_server(mode='inline')