Compute basic values
basic_values(sm)List of plde fit
basic_values function computes
transformed variable (sm$X_transform),
rectangular node points (sm$nodes) and weights (sm$weights)
for numerical integrations,
coefficient vector (sm$coefficients),
basis matrix at node and data points (sm$B_mat, sm$X_mat),
and basis mean (sm$B_mean).
JungJun Lee, Jae-Hwan Jhong, Young-Rae Cho, SungHwan Kim and Ja-Yong Koo. "Penalized Log-density Estimation Using Legendre Polynomials." Submitted to Communications in Statistics - Simulation and Computation (2017), in revision.