numericalDiscreteVariable.cpp

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#include <agrum/base/variables/numericalDiscreteVariable.h>
 
#include <agrum/base/core/math/math_utils.h>
 
#ifdef GUM_NO_INLINE
#  include <agrum/base/variables/numericalDiscreteVariable_inl.h>
#endif /* GUM_NO_INLINE */
 
namespace gum {

  NumericalDiscreteVariable::NumericalDiscreteVariable(std::string_view             aName,
                                                       std::string_view             aDesc,
                                                       const std::vector< double >& domain) :
      DiscreteVariable(aName, aDesc) {
    // get the values in increasing order
    _domain_.reserve(domain.size());
    for (const auto value: domain) {
      if (!gum::isfinite< double >(value)) {
        GUM_ERROR(DefaultInLabel, "Value '" << value << "' is not allowed for variable " << aName)
      }
      if (!isValue(value)) { _domain_.push_back(value); }
    }
    std::sort(_domain_.begin(), _domain_.end());
 
    // for debugging purposes
    GUM_CONSTRUCTOR(NumericalDiscreteVariable)
  }

  NumericalDiscreteVariable::NumericalDiscreteVariable(std::string_view aName,
                                                       std::string_view aDesc,
                                                       double           first,
                                                       double           last,
                                                       Size nb) : DiscreteVariable(aName, aDesc) {
    // store the sorted values into a sequence
    if (nb < 2) GUM_ERROR(ArgumentError, "The size of the domain must be >2 (here :" << nb << ").")
    if (first >= last)
      GUM_ERROR(ArgumentError, "first (here :" << first << " must be <last (here :" << last << ").")
 
    if (!gum::isfinite< double >(first)) {
      GUM_ERROR(DefaultInLabel, "Tick '" << first << "' is not allowed for variable " << name())
    }
    if (!gum::isfinite< double >(last)) {
      GUM_ERROR(DefaultInLabel, "Tick '" << last << "' is not allowed for variable " << name())
    }
 
    _domain_.resize(nb);
    _domain_.clear();
 
    const double step    = (last - first) / (double(nb) - 1);
    const double mask    = std::pow(10, std::max(4, int(2 + std::abs(-std::log10(step)))));
    double       current = first;
 
    _domain_.push_back(first);
    for (Idx i = 1; i < nb - 1; i++) {
      current += step;
      _domain_.push_back((std::round(current * mask) / mask));
    }
    _domain_.push_back(last);
 
    std::sort(_domain_.begin(), _domain_.end());
 
    // for debugging purposes
    GUM_CONSTRUCTOR(NumericalDiscreteVariable);
  }

  std::string NumericalDiscreteVariable::domain() const {
    const Size  size = domainSize();
    std::string s    = "{";
    if (size > 0) {
      s += std::format("{}", _domain_[0]);
      for (Idx i = 1; i < size; ++i)
        s += std::format("|{}", _domain_[i]);
    }
    s += "}";
    return s;
  }
}   // namespace gum