MATLAB Examples

Compare Student's t and Normal Distribution pdfs

Compute the pdf for a Student's t distribution with parameter nu = 5, and for a standard normal distribution.

x = -5:0.1:5;
y = tpdf(x,5);
z = normpdf(x,0,1);

Plot the Student's t and standard normal pdfs on the same figure. The standard normal pdf (dashed line) has shorter tails than the Student's t pdf (solid line).

figure;
plot(x,y,'-',x,z,'-.')