Question with df?EditPPSpline1D in Data Fitting Functions

Hi all,

I have a question about parameter bc of function df?EditPPSpline1D.  In the documantation ( https://software.intel.com/en-us/node/522222#D69BA4E7-E8BD-4413-A2A9-769D5002F832 ) says :

bc

const float* for dfsEditPPSpline1D

const double* for dfdEditPPSpline1D

Pointer to boundary conditions. The size of the array is defined by the value of parameter bc_type:

• If you set free-end or not-a-knot boundary conditions, pass the NULL pointer to this parameter.

• If you combine boundary conditions at the endpoints of the interpolation interval, pass an array of two elements.

• If you set a boundary condition for the default quadratic spline or a periodic condition for Hermite or the default cubic spline, pass an array of one element.

But if y is vector value function with dimension ny(>1), on the last case, it only need one element array? or ny elements array instead?