% Peer Training: Intermediate MATLAB
% DATA FILE: graphics.m
% Written by Omar Lakkis
% Last updated 02/15/00

clear
close all

t = -pi:.1:pi;

y1 = sin(t);
y2 = sin(t).*exp(-t.^2);
y3 = cos(t/2)+1;
y4 = t.^4/50+t.^2/5+1;