text: // ParticleUtilities.h
  // Copyright 2019 Mikko Lauri
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef PARTICLEUTILITIES_H
  #define PARTICLEUTILITIES_H
  #include <vector>
  #include "PRNG.h"
  namespace pgi {
  double normalize(std::vector<double>& weights);
  void resample(const std::vector<double>& weights,
                std::vector<std::size_t>& resample_indices, PRNG& rng);
  double effective_size(const std::vector<double>& weights);
  }  // namespace pgi
  #endif  // PARTICLEUTILITIES_H
  