betaA

Vector of the eigenvalues of the
 symmetric matrix A.

eigenvaluesA

The transpose of the matrix of eigen vectors of the
 symmetric matrix A times the inverse of the square root of the diagonal matrix D.

The square root of the diagonal matrix D times
 the eigen vectors of the symmetric matrix A.

The number of eigenvalues (numerically) equals to 1.

A scalar which gives the number of iterations.

The index of the first eigen values of S
 numerically equal to 0.


Calculates the coefficients for the iterative bias reduction  smoothers. This function is not intended to be used directly.

Multivariate smoothing using iterative bias reduction with kernel, thin plate splines, Duchon splines or low rank splines.