insert

Inserts new column at specific position in DataFrame.

insert 
    (columnName) { rowExpression } | (column)
    .under { parentColumn } | .after { column } | .at(position)

rowExpression: DataRow.(DataRow) -> Value

Similar to add, but supports column positioning.

Create new column based on existing columns and insert it into DataFrame:

df.insert("year of birth") { 2021 - age }.after { age }

df.insert("year of birth") { 2021 - "age"<Int>() }.after("age")

Insert previously created column:

val score by columnOf(4, 5, 3, 5, 4, 5, 3)
df.insert(score).at(2)

20 May 2025