// constantes
R = 1;
p = 1;

// fonctions
deff('[x] = fx(t)', 'x = R*cos(2*%pi*t)')
deff('[y] = fy(t)', 'y = R*sin(2*%pi*t)')
deff('[z] = fz(t)', 'z = p*t')

// tracé

t = 0:0.01:4;

subplot(2,2,1)
param3d(fx(t), fy(t), fz(t),45,0)
a=get('current_axes');
a.isoview='on';

subplot(2,2,2)
param3d(fx(t), fy(t), fz(t),45,33)
a=get('current_axes');
a.isoview='on';

subplot(2,2,3)
param3d(fx(t), fy(t), fz(t),45,67)
a=get('current_axes');
a.isoview='on';

subplot(2,2,4)
param3d(fx(t), fy(t), fz(t),45,90)
a=get('current_axes');
a.isoview='on';