Function cosine_similarity 

pub fn cosine_similarity(a: &[f32], b: &[f32]) -> f32

Compute cosine similarity between two vectors

Returns a value in [-1, 1] where:

• 1 = identical direction
• 0 = orthogonal
• -1 = opposite direction

Arguments

• a - First vector
• b - Second vector (must be same length as a)

Returns

Cosine similarity score, or 0.0 if vectors are empty or different lengths

Example

use ruvector_data_framework::utils::cosine_similarity;

let a = vec![1.0, 0.0, 0.0];
let b = vec![1.0, 0.0, 0.0];
assert!((cosine_similarity(&a, &b) - 1.0).abs() < 1e-6);

let c = vec![0.0, 1.0, 0.0];
assert!(cosine_similarity(&a, &c).abs() < 1e-6);