libigl_Martin/include/igl/mat_min.h

#ifndef IGL_MAT_MIN_H
#define IGL_MAT_MIN_H
#include "igl_inline.h"
#include <Eigen/Dense>

namespace igl
{
  // Ideally this becomes a super overloaded function supporting everything
  // that matlab's min supports

  // Min function for matrices to act like matlab's min function. Specifically
  // like [Y,I] = min(X,[],dim);
  //
  // Templates:
  //   T  should be a eigen matrix primitive type like int or double
  // Inputs:
  //   X  m by n matrix
  //   dim  dimension along which to take min 
  // Outputs:
  //   Y  n-long sparse vector (if dim == 1) 
  //   or
  //   Y  m-long sparse vector (if dim == 2)
  //   I  vector the same size as Y containing the indices along dim of minimum
  //     entries
  //
  // See also: mat_max
  template <typename T>
  IGL_INLINE void mat_min(
    const Eigen::Matrix<T,Eigen::Dynamic,Eigen::Dynamic> & X,
    const int dim,
    Eigen::Matrix<T,Eigen::Dynamic,1> & Y,
    Eigen::Matrix<int,Eigen::Dynamic,1> & I);
}

#ifdef IGL_HEADER_ONLY
#  include "mat_min.cpp"
#endif

#endif