Function logspace

src/utilities/data/Vector.cpp:240–249

generates a Vector of N points logarithmically spaced between and including base^a and base^b.

/// generates a Vector of N points logarithmically spaced between and including base^a and base^b.
Vector logspace(double a, double b, unsigned N, double base) {
  Vector powers = linspace(a, b, N);

  Vector result(N);
  for (unsigned n = 0; n < N; ++n) {
    result(n) = std::pow(base, powers(n));
  }

  return result;
}

/// take the natural logarithm of elements of a Vector
Vector log(const Vector& x) {