Computes the total phi and total theta vector length.
sarma_calculate_spadding(np, nq, nsp, nsq, ns)An unsigned int containing the number of non-seasonal phi parameters.
An unsigned int containing the number of non-seasonal theta parameters.
An unsigned int containing the number of seasonal phi parameters.
An unsigned int containing the number of seasonal theta parameters.
A vec with rows:
Number of phi parameters
Number of theta parameters