水平条形图

这个例子是一个通过将定量值放在x轴上绘制的水平条形图。

Method syntax

import altair as alt
from vega_datasets import data

source = data.wheat()

alt.Chart(source).mark_bar().encode(
    x='wheat:Q',
    y="year:O"
).properties(height=700)

Attribute syntax

import altair as alt
from vega_datasets import data

source = data.wheat()

alt.Chart(source).mark_bar().encode(
    x='wheat:Q',
    y="year:O"
).properties(height=700)
# No channel encoding options are specified in this chart
# so the code is the same as for the method-based syntax.