双轴带折线的柱状图

此示例展示了如何组合两个图表并保留它们的坐标轴。

有关此图表的更精美版本，请参阅小麦与工资。

方法语法

import altair as alt
from vega_datasets import data

source = data.wheat()

base = alt.Chart(source).encode(x='year:O')

bar = base.mark_bar().encode(y='wheat:Q')

line =  base.mark_line(color='red').encode(
    y='wages:Q'
)

(bar + line).properties(width=600)

属性语法

import altair as alt
from vega_datasets import data

source = data.wheat()

base = alt.Chart(source).encode(x='year:O')

bar = base.mark_bar().encode(y='wheat:Q')

line =  base.mark_line(color='red').encode(
    y='wages:Q'
)

(bar + line).properties(width=600)
# No channel encoding options are specified in this chart
# so the code is the same as for the method-based syntax.