我想知道如何在Streamlit上使用Altair绘制多个Y轴。
import pandas as pd
import numpy as np
import altair as alt
import streamlit as st
df = pd.DataFrame({
'name': ['brian', 'dominik', 'patricia'],
'age': [20, 30, 40],
'salary': [1000, 2000, 3000]
})
c = alt.Chart(df).mark_area().encode(
x='name', y=['age', 'salary'])
st.altair_chart(c, use_container_width=True)
上面的示例返回以下错误:
SchemaValidationError:无效的规范altair.vegalite.v4.schema.core.FacetedEncoding-> 0,验证了'type'[{'type':'quantitative','field':'age'},{'type': 'quantitative','field':'salary'}]的类型不是“ object”
答案 0 :(得分:0)
我发现自己如何使用 layer :
df = pd.DataFrame({
'name': ['brian', 'dominik', 'patricia'],
'age': [20, 30, 40],
'salary': [100, 200, 300]
})
a = alt.Chart(df).mark_area(opacity=1).encode(
x='name', y='age')
b = alt.Chart(df).mark_area(opacity=0.6).encode(
x='name', y='salary')
c = alt.layer(a, b)
st.altair_chart(c, use_container_width=True)