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)
以上示例返回以下错误:
SchemaValidationError: 规范altair.vegalite.v4.schema.core.FacetedEncoding->0无效,验证'type'[{'type': 'quantitative', 'field': 'age'}, {'type': 'quantitative', 'field': 'salary'}]的类型不是'object'