Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Library: smoother
See also: dengau

Quantlet: gauder
Description: gauder evaluates derivatives of the Gaussian kernel rescaled by a bandwidth h, to be used for density estimation bandwidth selection.

Reference(s):

Usage: y = gauder (x, h, p)
Input:
x n x 1 vector
h scalar, bandwidth
p scalar, order of derivative
Output:
y n x 1 matrix, Gaussian density derivatives

Example:

library("smoother")                                       

x = aseq(-1, 21, 0.1)                                      

y = gauder(x,1,3)                                

t = createdisplay(1,1)                                      

show(t,1,1,x~y)                                      

Result:

plot the third normal derivative, bandwidth = 1                                                           ; -----------------------------------------------------------------


Library: smoother
See also: dengau

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Author: Lijian Yang, 960820
(C) MD*TECH Method and Data Technologies, 21.9.2000