r = distance measured from the axis of rotation to where the linear force is applied
theta = the angle between F and r
In our equation, sin(theta) has no units, r has units of meters (m), and F has units of Newtons (N). Combining these together, we see that a unit of torque is a Newton-meter (Nm).
I think that you have to create a time scale and obtain the vector of r * sin(theta) for each time by knowing the increment of the angle of rotation.
Than, you will have a vector of a T. That will be finding arcin (theta)=T/ (F*r) across the digitized set of angles of roation.