| Library: | distribs |
| See also: | normalmixselect normalmix normal |
| Quantlet: | normalmixdens | |
| Description: | evaluating a normal mixture density function |
| Usage: | fx = normalmixdens(x,w,mu,sigma) | |
| Input: | ||
| x | p x 1 vector, evaluation point(s) | |
| w | p x 1 vector, weights of the mixture components | |
| mu | p x 1 vector, means of the mixture components | |
| sigma | p x 1 vector, standard deviations of the mixture components | |
| Output: | ||
| fx | p x 2 matrix, represents the points x and the values of the density at x | |
- components with w <= 0 are ignored;
- negative standard deviations are not accepted
library("distribs")
library("plot")
w=#(1,1,1)
mu=#(0,5,10)
sig=#(1,1,1)
x=grid(-5,0.1,200)
fx=normalmixdens(x,w,mu, sig)
px=setmask(fx, "line")
plot(px)
Plots a trimodal normal mixture density function