Grouped bar chart instead of stacked bar chart?

[AndhikaWB]

I'm trying to separate business and economy class but for some reason I can't make it as grouped bar chart?

import polars as pl
import altair as alt

df = pl.read_csv('data.csv')

c1 = alt.Chart(
    data = df.with_columns(
        (pl.col('price') / pl.col('duration')).alias('price_per_hour')
    ),
    title = 'Most Expensive Airlines'
).mark_bar().encode(
    x = alt.X('price_per_hour', aggregate = 'average', title = 'Average price per hour'),
    y = alt.Y('airline', sort = '-x'),
    color = 'class'
)

c1

I followed the gallery example but the difference is I don't need to use the column parameter. The data is on Kaggle.

[mattijn]

Maybe using a row encoding channel? See https://altair-viz.github.io/gallery/grouped_bar_chart_horizontal.html

Or yOffset encoding channel, see example using xOffset: https://altair-viz.github.io/gallery/grouped_bar_chart2.html

[AndhikaWB]

Oops.. I already tried xOffset before and it didn't work, but I didn't realize that there's yOffset too. Thanks!