Is it possible to concatenate repeated charts?

[taralloc]

Is it possible to concatenate repeated charts? This code, for example, does not work:

import altair as alt
from vega_datasets import data

iris = data.iris.url

chart1 = alt.Chart(iris).mark_point().encode(
    alt.X(alt.repeat("column"), type='quantitative'),
    alt.Y(alt.repeat("row"), type='quantitative'),
    color='species:N'
).repeat(
    row=['petalLength', 'petalWidth'],
    column=['sepalLength', 'sepalWidth']
)
chart2 = alt.Chart(iris).mark_point().encode(
    alt.X(alt.repeat("column"), type='quantitative'),
    alt.Y(alt.repeat("row"), type='quantitative'),
    color='species:N'
).repeat(
    row=['petalWidth', 'petalLength'],
    column=['sepalWidth', 'sepalLength']
)

alt.hconcat(chart1,chart2).show()

because it throws this error

JavaScript Error: Duplicate scale or projection name: "child__row_petalWidthcolumn_sepalWidth_x".

[joelostblom]

@taralloc I am going through Altair issues to find those that have been resolved and can be closed. Since this is something that needs to be fixed in Vega-Lite rather than in Altair, would you be able to close this issue or add a comment if there is something you don't think is resolved yet on the Altair side of things?

The relevant vegalite issues are vega/vega-lite#5261 and vega/vega-lite#4680 (although they are not exactly what you are asking here, I reading them and then opening a new Vega-Lite issue)

[taralloc]

OK, I'll close this issue. What I wanted to do is still not possible, but it is due to vega-lite.