Question

I am new to statistics. I have a discriminant function:

 
g(x) = ln p(x| w)+ lnP(w)

I know it has a normal distribution. I know mü and sigma variables. How can I plot pdf function of it at Matlab?

Here is a conversation: How to draw probability density function in MatLab? however I don’t want to use any toolbax of Matlab.

Answer 1

Use normpdf, or mvnpdf for a multivariate Normal distribution:

mu = 0;
sigma = 1;

xs = [-5:.1:5];
ys = normpdf(xs, mu, sigma);
clf;
plot(xs, ys);