带 Datum 着色的折线图#
使用 datum
和 repeat
为多系列折线图着色的示例。此示例改编自相应的 Vega-Lite 示例:重复和分层以显示不同的电影度量。
import altair as alt
from vega_datasets import data
source = data.movies()
alt.Chart(source).mark_line().encode(
alt.X("IMDB_Rating").bin(True),
alt.Y(alt.repeat("layer"))
.aggregate("mean")
.title("Mean of US and Worldwide Gross"),
color=alt.datum(alt.repeat("layer")),
).repeat(
layer=["US_Gross", "Worldwide_Gross"]
)
import altair as alt
from vega_datasets import data
source = data.movies()
alt.Chart(source).mark_line().encode(
x=alt.X("IMDB_Rating", bin=True),
y=alt.Y(
alt.repeat("layer"), aggregate="mean", title="Mean of US and Worldwide Gross"
),
color=alt.datum(alt.repeat("layer")),
).repeat(layer=["US_Gross", "Worldwide_Gross"])