%-------------------------------------%
% Homework 5: 4.2                     %
% Date: 10/21/2002                    %
%                                     %
% Gun Srijuntongsiri                  %
% gs61                                %
% ??????                              %
%-------------------------------------%

% Variables:
%   t = free variable running from -9 to 9
%   y = y(t) from the equation

format compact        % Suppress extra space b/w lines

t = -9:.5:9                 % vector of t's
y(1:18)=3.*t(1:18).^2 + 5;      % calculate y for negative t's
y(19:37)=-3.*t(19:end).^2 + 5; % calculate y for nonnegative t's

y                           % output y