How to change spacing between facets (rows/columns)

[mcp292]

MWE

import altair as alt
from vega_datasets import data


source = data.barley()

chart = alt.Chart(source).mark_bar().encode(
    x=alt.X('year:O', title="More than year"),
    y='sum(yield):Q',
    color='year:N',
    column='site:N'
)

chart.show()

Question

How can I space out the colums such that the labels no longer overlap?

[joelostblom]

There is a spacing parameter (although it might be nicer to make these vertical bar chart, add newlines, or rotate the labels):

alt.Chart(source).mark_bar().encode(
    x=alt.X('year:O', title="More than year"),
    y='sum(yield):Q',
    color='year:N',
    column=alt.Column('site:N', spacing=50)
)

[mcp292]

So cool! Altair continues to impress!

Not sure I understood your suggestion, but I'm interested to hear it. I thought these were vertical bar charts. Do you mean non-faceted? What do you mean by adding newlines?

I understand the suggestion for rotating the label, that's actually a very clean fix! I'll have to look into how to do that!

[mcp292]

Okay so for rotate, something like this?

import altair as alt
from vega_datasets import data


source = data.barley()

chart = alt.Chart(source).mark_bar().encode(
    x=alt.X(
        'year:O',
        axis=alt.Axis(
            title="More than year", titleAngle=-90, titleAlign="right")),
    y='sum(yield):Q',
    color='year:N',
    column='site:N'
)

chart.show()