Join two data frames. The columns of the joined frames must not overlap and their rows are aligned and transformed according to the specified join kind. For more alignment options on ordered frames, see `joinAlign`. ## Parameters - `frame1` - First data frame (left) to be used in the joining - `frame2` - Other frame (right) to be joined with `frame1` - `kind` - Specifies the joining behavior on row indices. Use `JoinKind.Outer` and `JoinKind.Inner` to get the union and intersection of the row keys, respectively. Use `JoinKind.Left` and `JoinKind.Right` to use the current key of the left/right data frame. [category:Joining, merging and zipping]

public static Frame<R, C> Join<R, C>(
	JoinKind kind,
	Frame<R, C> frame1,
	Frame<R, C> frame2
)