keysInto

Reshapes the columns previously selected by gather into a new keyColumn, containing the original column names. The value column is omitted.

Returns a new DataFrame with the reshaped structure. The original gathered columns are removed from the result, while all other columns remain unchanged — except that their values are duplicated for each generated key.

Resulting key values can be adjusted using mapKeys.

For more information, see: See gather on the documentation website.

See also: Grammar.

Example

// Gather names of all columns containing "series" in their name
// into a single "seriesType" column, omitting the value column.
df.gather { cols { it.name().contains("series") } }
  .keysInto("seriesType")

Parameters

See also