implode

Returns DataFrame where values in given columns are merged into lists grouped by other columns.

API reference: implode

See column selectors for how to select the columns for this operation.

Parameters:

• dropNA — if true, NA values are removed from the merged lists of value columns. Has no effect on imploded column groups and frame columns.

Reverse operation: explode

Imploded columns will change their types:

• T to List<T>

• DataRow to DataFrame

Imploded ColumnGroups will be converted into FrameColumns