How to determine speed of an object when using transform.position

Hi, I am using the following code to rotate and move the player

        float cameraSmooth = 5.0f;
        float modX;
        float modZ;
        float moveSpeed = 50.0f;
        modX = Input.GetAxis("Horizontal") * Time.deltaTime * moveSpeed;
        modZ = Input.GetAxis("Vertical") * Time.deltaTime * moveSpeed;
        modifier.z = modZ;
        modifier.x = modX;

        transform.position = Vector3.Lerp(transform.position, transform.position + modifier, Time.deltaTime * cameraSmooth);

        var inputZ = Input.GetAxis("Vertical");
        var inputX = Input.GetAxis("Horizontal");
        var angle = Mathf.Atan2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical")) * Mathf.Rad2Deg;
        transform.rotation = Quaternion.Euler(0, angle, 0);

The problem I have is that I need to determine the speed of the object to affect animation speed.

I cant use the joystick axis as it goes from -1 to +1 and I cannot use rigidbody.velocity.magnitude as I am not using forces.

Is there any way I can work out the speed of the object from a scale of 0 to 1?

You can’t use the joystick because it goes from -1 to 1? Could you not just use Mathf.Abs(Input.GetAxis("Horizontal")) to get a value in the correct range then?

If that’s no good, just store your position every frame in some variable Vector3 prevPosition and each frame you can do something like:

float instantaneousSpeed = Vector3.Distance(transform.position, prevPosition);

Since you have a rigidbody, why don’t you just use Rigidbody.MovePosition and Rigidbody.MoveRotation? Then I think you could use the rigidbody.velocity.magnitude that you mentioned. You might need to normalize it first to get it into unit vector form.
So your code might look like this:

rigidbody.MovePosition(rigidbody.position + moveSpeed * Time.deltaTime);

float velMag = rigidbody.velocity.magnitude;
animator.SetFloat("Speed", velMag / moveSpeed);