vega-lite-api

vl.lookupData(data)

Specify a lookup on a secondary data source.

The behavior of this method depends on the argument type:

• If the argument is an Array, sets the values property.
• If the argument is an Iterable, sets the values property.
• If the argument is a String, sets the url property.
• Otherwise, sets the properties defined on the input argument(s), if provided.

lookupData Method Overview

• data
• fields
• key

lookupData API Reference

# lookupData.data(value)

Secondary data source to lookup in.

# lookupData.fields(…value)

Fields in foreign data or selection to lookup. If not specified, the entire object is queried.

# lookupData.key(value)

Key in data to lookup.

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