how i can have 2 points joining with quiver

Hello.I want to make a velocity vector from a point (i,j) to a point(k,z) on an image.How i can use quiver for it? Thanks

Answer 1

[Walter Roberson]

annotate()

Answer 2

[bym]

x = imread('peppers.png');
imshow(x)
hold
quiver(50,50,100,100)

[freebil]

thanks for the answer but the arrow dont start from (50,50) and don't finish to (100,100). I have to put different parameters and i dont know which are them.