fn test_direction(
cause_dims: &[Vec<f64>],
effect_dims: &[Vec<f64>],
lag: usize,
_n: usize,
) -> (f64, f64, f64, Vec<f64>)Expand description
Test one direction: does cause Granger-cause effect?
Returns (combined_p, mean_f, effect_size, per_dim_f).