clear
figure
title ('3D plot')
sgtitle('3D and XOY - projection') 
X=sort(3*rand(1,1000));
Y=sort(2*rand(1,1000));
subplot(2,1,1)
h=line(X,Y,'linewidth',2); grid on
Z=sin(X).*exp(Y); %? Объясните синтаксис!
subplot(2,1,2)
plot3(X,Y,Z,'linewidth',2,'color','magenta') % 
polyline 3d (try rotate)
grid on