xs
Return cross-section from the DataFrame.
API reference: xs
Filters DataFrame by matching key values with key columns and removes key columns.
xs(vararg keyValues: Any?)
[ { keyColumns } ]
When keyColumns are not specified, it takes the first n columns in depth-first order (looking inside ColumnGroup), where n is the number of given keyValues.
df.xs("Charlie", "Chaplin")
df.xs("Moscow", true) { city and isHappy }
02 November 2026