coordinates of a 3D line

Hi,

I'm starting with 3D and I want to plot a line in 3D which start in one point P1 and finishes in another P2, and obtain all the coordinates points of the line with a resolution R. Could I do something similar to the following:
I don’t know the value for t:
P1=[-1 5 2];
P2=[0 0 0]
resol = 0.1;
x0 = P1(1);
y0 = P1(2);
z0 = P1(3);
t=-1:resol:1
dx = P2(:,1)-P1(:,1)
dy = P2(:,2)-P1(:,2)
dz = P2(:,3)-P1(:,3)

x = x0 + t*dx
y = y0 + t*dy
z = z0 + t*dz

plot3(x,y,z,'b')

Thanks very much