> the particles have new locations [X1, Y1]. Is there a way to get this new location data?
If you already have the X, Y, U and V values, then the new location is
xnew = x+u;
ynew = y+v;
However, unless scaling is turned off, the head of the quiver arrows will likely not be at [xnew, ynew] because quiver internally scales the magnitude of the arrows so they all fit nicely in the axes. Here are two solutions.
Example: turn off scaling
x = rand(1,20)*20 - 10;
y = rand(1,20)*10 + 40;
u = rand(1,20)*6 - 3;
v = rand(1,20)*10 - 5;
quiver(x,y,u,v,'off')
x1 = x + u;
y1 = y + v;
hold on
plot(x, y, 'bo') % mark arrow tail
plot(x1, y1, 'rs') % mark arrow head
Example: Use the ScaleFactor property (R024a)
Starting in R2024a, the quiver object returned by quiver contains a read-only ScaleFactor property that can be used to compute the magnitudes of the quiver arrows whether auto scaling is turned on or off. Multiply U and V by the scale factor to get the horizontal and vertical distance between the arrow tails and arrow heads.
figure()
h = quiver(x,y,u,v);
h.ScaleFactor
x1 = x + h.ScaleFactor*u;
y1 = y + h.ScaleFactor*v;
hold on
plot(x, y, 'bo') % mark arrow tail
plot(x1, y1, 'rs')
