writing a formula in matlab

Hello,

I'm trying to write a function in matlab.

I have an example:

A gaussian kernel is

% Gaussian kernel function
%kerf=@(z)exp(-z.*z/2)/sqrt(2*pi);

How would you code an epanechnikov kernel?

I have the equation for both here? http://dl.dropbox.com/u/54057365/All/kernel1.JPG

How would you deal with the absolute value of t being less than or equal to 1?

Thank for your help

John

Answer 1

[the cyclist]

kerf=@(z) (3/4)*(1-z.^2).*(abs(z)<=1)