derivOperator {sharpPen}

Shape Constraint Matrix Construction

Description

Construct a shape constraint matrix at a corresponding sequence of x data and sequence of gridpoint z.

Usage

  derivOperator(penalty,gamma,h, xx,zz,p) 

Arguments

penalty

the type of shape constraint, can be "drv1", "drv2", "drv3", "drv4", "Exponential" and "Periodicity".

gamma

the shape constraint parameter

h

the kernel bandwidth smoothing parameter.

xx

numeric vector of x data. Missing values are not accepted.

zz

numeric vector of gridpoint z data. Missing values are not accepted.

p

degree of local polynomial used.

Value

shape constraint matrix

Author(s)

X.J. Hu