plot 3d trajectory problem

hey every one

i try to plot a trajectory in 3d , i write the command & execute it then the program draw it in 2d but when i identify a point i find it 3d , can any one help me to realise the 3d view of the particle trajectory ??

xp , yp & zp are 3 massive matrices for multi-particules in different ietration times,

here i just try to plot in 3d the trajectory of one particle only,

please help,

thank you in advance;

here is the code used :

xp1=xp(1,:); yp1=yp(1,:); zp1=zp(1,:);

hold on;

plot3 (xp1,yp1,zp1);

% plot (xp(1,:),yp(1,:),'b');

hold off;

Answer 1

[Chirag Gupta]

It looks good to me: Here's my sample code

% Sample trajectory
t = 0:0.1:10;
x = 5*cos(t);
y = 5*sin(t);
z = sin(t)+cos(t)+t;
plot3(x,y,z,'*r');

%if you want to animate it

for i=1:length(x)
  plot3(x(i),y(i),z(i),'*r');
  hold on;
  pause(0.01);
end

[shady]

ya it is the same as in the help of matlab but i need it for my own data & code written , thnx