Faceted Histogram

This example shows how to make a basic faceted histogram, with one histogram subplot for different subsets of the data.

Based off the vega-lite example: https://vega.github.io/vega-lite/examples/trellis_bar_histogram.html

Method syntax

import altair as alt
from vega_datasets import data

source = data.cars()

alt.Chart(source).mark_bar().encode(
    alt.X("Horsepower:Q").bin(),
    y="count()",
    row="Origin",
)

Attribute syntax

import altair as alt
from vega_datasets import data

source = data.cars()

alt.Chart(source).mark_bar().encode(
    alt.X("Horsepower:Q", bin=True),
    y="count()",
    row="Origin",
)