NWmat {sharpData} | R Documentation |
This function computes the A matrix for use in quadprog. This matrix corresponds to the derivative matrix for constrained sharpening in the monotonic regression problem.
NWmat(xgrid, x, h, kernel = "biweight")
xgrid |
a vector of gridpoints to evaluate estimate at |
x |
a vector containing the predictor data |
h |
a scalar bandwidth |
kernel |
a character string naming the kernel function |
a matrix
W.J. Braun