max.hpp

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#ifndef STAN__MATH__MATRIX__MAX_HPP
#define STAN__MATH__MATRIX__MAX_HPP

#include <stdexcept>
#include <vector>
#include <stan/math/matrix/Eigen.hpp>

namespace stan {
  namespace math {
    
    inline int max(const std::vector<int>& x) {
      if (x.size() == 0)
        throw std::domain_error("error: cannot take max of empty int vector");
      int max = x[0];
      for (size_t i = 1; i < x.size(); ++i)
        if (x[i] > max) 
          max = x[i];
      return max;
    }

    template <typename T>
    inline T max(const std::vector<T>& x) {
      if (x.size() == 0)
        return -std::numeric_limits<T>::infinity();
      T max = x[0];
      for (size_t i = 1; i < x.size(); ++i)
        if (x[i] > max) 
          max = x[i];
      return max;
    }

    template <typename T, int R, int C>
    inline T max(const Eigen::Matrix<T,R,C>& m) {
      if (m.size() == 0)
        return -std::numeric_limits<double>::infinity();
      return m.maxCoeff();
    }
    
  }
}
#endif