
{{alias}}( x, axis )
    Expands the shape of an array by inserting a new dimension of size one at a
    specified axis.

    A provided axis must reside on the interval `[-N-1, N]`, where `N` is the
    rank (i.e., number of dimensions) of the provided input array.

    If provided a negative axis value, the axis position at which to insert a
    singleton dimension is computed as `N + axis + 1`. Hence, if provided `-1`,
    the resolved axis position is `N` (i.e., a singleton dimension is appended
    to the input array).

    Parameters
    ----------
    x: ndarray
        Input array.

    axis: integer
        Axis at which to insert a singleton dimension.

    Returns
    -------
    out: ndarray
        Output array.

    Examples
    --------
    > var x = {{alias:@stdlib/ndarray/array}}( [ [ 1, 2 ], [ 3, 4 ] ] )
    <ndarray>
    > var sh = x.shape
    [ 2, 2 ]
    > var y = {{alias}}( x, 1 )
    <ndarray>
    > sh = y.shape
    [ 2, 1, 2 ]
    > var v = y.get( 0, 0, 0 )
    1
    > v = y.get( 0, 0, 1 )
    2
    > v = y.get( 1, 0, 0 )
    3
    > v = y.get( 1, 0, 1 )
    4

    See Also
    --------

