dvect24.cpp

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#include "fvar.hpp"

ivector sgn(const dvector& v)
{
  int mmin = v.indexmin();
  int mmax = v.indexmax();
  ivector ret(mmin, mmax);
  for (int i = mmin; i <= mmax; ++i)
  {
    ret(i)= v(i) > 0 ? 1 : -1;
  }
  return ret;
}