Wind support, or wind profit, is the projection of the wind vector \(\vec{v}_w\) onto the groundspeed vector \(\vec{v}_g\), $$\text{Wind Support} = \frac{\vec{v}_g \cdot \vec{v}_w}{|\vec{v}_g|}$$, with \(\cdot\) being the cross product.
A positive value indicates that wind was blowing in the direction of movement, while a negative one indicates a head wind.
windspeed and groundspeed should be expressed as complex value where the real part
corresponds to the east-west component and imaginary part to the north-south component.
Alternatively to wind support, you can compute the drift (or crosswind component) value with
drift = TRUE,
$$\text{Drift} = \frac{|\vec{v}_g \times \vec{v}_w|}{|\vec{v}_g|}$$,
with \(\times\) being the cross product.
A positive value of drift indicates that the wind is pushing the bird to the right of its intended path, while a negative indicates that the wind is pushing the bird to the left.
You can use abs() (or Mod()) to compute the norm (or absolute value) of the speed vector and
speed_to_bearing() to compute the bearing/orientation of the speed vector. The latter
computes the trigonometric angle of the speed vector with Arg() and convert this angle to a
bearing (North = 0° instead of 90°).