How to reverse the sort order of stacked bars

Here’s my draft chart.

alt.Chart(latino_chart_prepped, title="Latino share of U.S. population").mark_bar().encode(
    alt.X('age:O', axis=alt.Axis(title="Age"), sort=alt.SortField(field="sort", op="sum", order="ascending")),
    alt.Y('population:Q',
        axis=alt.Axis(title='Percent of population'),
        stack='normalize'
    ),
    alt.Color('group:N', legend=None)
).properties(
    width=600
)

How do I reverse the sort order so that the smaller blue bars are on the bottom of each stack in the chart?

[jakevdp]

Nope, I’m still working on getting things like that in the docs. It’s a long process.

Some examples would be useful… we also need an actual in-depth discussion of all the encodings that are available and what they are good for.

[jakevdp]

Add an order channel:

alt.Chart(...).encode(
    ...
    order=alt.Order('group', sort='ascending')
    ...
)

You may need to use sort='descending' instead… without seeing your data, it’s difficult to guess.