% lect11_1: Simple 3D plot

% Vector of independent variables for plotting the function
t = 0:0.1:6*pi;
% Evaluate the functions for x, y, and z
x = sqrt(t).*sin(2*t);
y = sqrt(t).*cos(2*t);
z = 0.5*t;
% Plot it
plot3(x, y, z, 'k', 'linewidth', 1)
grid on
xlabel('x'); ylabel('y'); zlabel('z');