import altair as alt
import numpy as np
import pandas as pd
np.random.seed(9)
mean = np.random.randn(46).cumsum()
lower = mean - 2
upper = mean + 2
dfr = pd.DataFrame(list(zip(mean, lower, upper)),
columns=["Mean", "Lower", "Upper"],
index=pd.RangeIndex(46, name="x"))
line = alt.Chart(dfr.reset_index()).mark_line().encode(
x='x',
y='Mean'
)
band = line.mark_area(opacity=0.5).encode(
x='x',
y='Lower',
y2='Upper'
)
band + line
可以通过分层线图和面积图来实现这一点。例如:
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