How do I accomplish faceting with a JupyterChart?

[josephburkhart]

Hi there,

I would like to be able to create a small multiples arrangement of JupyterCharts - is there currently a way to do this? I looked through StackOverflow, the docs, and previous discussions and issues, but I was unable to find an answer on my own.

Here's a MWE:

The following code creates a simple faceted plot using a Chart:

import altair as alt
import pandas as pd

source = pd.DataFrame({
    'a': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'],
    'b': [28, 55, 43, 91, 81, 53, 19, 87, 52],
    'c': [5, 5, 5, 10, 10, 10, 15, 15, 15]
})

chart = alt.Chart(source).mark_bar().encode(
    x='a',
    y='b'
)
chart.facet(column='c')

The following code creates a JupyterChart with the same data:

import altair as alt
import pandas as pd

source = pd.DataFrame({
    'a': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'],
    'b': [28, 55, 43, 91, 81, 53, 19, 87, 52],
    'c': [5, 5, 5, 10, 10, 10, 15, 15, 15]
})

chart = alt.Chart(source).mark_bar().encode(
    x='a',
    y='b'
)

jchart = alt.JupyterChart(chart)
jchart

I would like to be able to make a JupyterChart that is faceted in the same way as the regular Chart, but of course when I try to run jchart.facet(column='c'), I get AttributeError: 'JupyterChart' object has no attribute 'facet'.

Any advice is appreciated. Thanks!

[mattijn]

chart = alt.Chart(source).mark_bar().encode(
    x='a',
    y='b'
).facet(column='c')

jchart = alt.JupyterChart(chart)

Is not working?

[josephburkhart]

It is - now I feel so dumb. Thank you!