def vpack(x, y, z):
    """
    Pack three scalar components into a vector.

    http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vpack_c.html

    :param x: first scalar component 
    :type x: float
    :param y: second scalar component 
    :type y: float
    :param z: third scalar component 
    :type z: float
    :return: Equivalent 3-vector.
    :rtype: 3-Element Array of floats
    """
    x = ctypes.c_double(x)
    y = ctypes.c_double(y)
    z = ctypes.c_double(z)
    vout = stypes.emptyDoubleVector(3)
    libspice.vpack_c(x, y, z, vout)
    return stypes.cVectorToPython(vout)
Pack three scalar components into a vector.

    http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vpack_c.html

    :param x: first scalar component 
    :type x: float
    :param y: second scalar component 
    :type y: float
    :param z: third scalar component 
    :type z: float
    :return: Equivalent 3-vector.
    :rtype: 3-Element Array of floats