dotProduct static method

double dotProduct(Float64List a, Float64List b)

Computes the dot product (scalar product) of two vectors.

The dot product measures how much two vectors "align" with each other. For vectors a and b: dot(a,b) = sum(a[i] * b[i]) for all dimensions i.

This is a key component in cosine similarity calculation.

Implementation

static double dotProduct(Float64List a, Float64List b) {
  assert(a.length == b.length);

  // Sum the element-wise products across all dimensions
  var sum = 0.0;
  for (var i = 0; i < a.length; ++i) {
    sum += a[i] * b[i];
  }

  return sum;
}