带链接刷选的多面板散点图

这是一个使用区间选择控制跨多个面板的点颜色的示例。

方法语法

import altair as alt
from vega_datasets import data

source = data.cars()

brush = alt.selection_interval(resolve='global')

base = alt.Chart(source).mark_point().encode(
    y='Miles_per_Gallon',
    color=alt.when(brush).then("Origin").otherwise(alt.ColorValue("gray")),
).add_params(
    brush
).properties(
    width=250,
    height=250
)

base.encode(x='Horsepower') | base.encode(x='Acceleration')

属性语法

import altair as alt
from vega_datasets import data

source = data.cars()

brush = alt.selection_interval(resolve='global')

base = alt.Chart(source).mark_point().encode(
    y='Miles_per_Gallon',
    color=alt.when(brush).then("Origin").otherwise(alt.ColorValue("gray")),
).add_params(
    brush
).properties(
    width=250,
    height=250
)

base.encode(x='Horsepower') | base.encode(x='Acceleration')
# No channel encoding options are specified in this chart
# so the code is the same as for the method-based syntax.