Drag direction

Unity Engine
1

Hi,
please guide me how to detect the finger drag direction ( up and down).

Advance thanks

2 
if (Input.touchCount == 1) {
			Touch t = Input.touches[0];
			if(t.phase == TouchPhase.Began) {
				startvec = t.position;//initialise touchdown vector
				ismoving = true;
			}
			else if(t.phase == TouchPhase.Ended) {
				ismoving = false;
			}
			if(ismoving){
				Vector2 v = t.position-startvec;// subtract startvec from current finger position 
                                if(v.y < 0) Debug.Log("down");
                                if(v.y > 0) Debug.Log("up");
				Move(v.y*0.1f);
				Turn(v.x*0.01f);
			}
		}
3

Thanks,its working. thanks again.