ApproxFunctionsImpl< 3 > Struct Reference

Static Public Member Functions
static double	fUn (const double x, const double y, double z)
static FTensor::Tensor1< double, 3 >	diffFun (const double x, const double y, double z)

Detailed Description

Definition at line 61 of file scalar_check_approximation.cpp.

Member Function Documentation

diffFun()

static FTensor::Tensor1< double, 3 > ApproxFunctionsImpl< 3 >::diffFun ( const double  x, const double  y, double  z  )

inlinestatic

Definition at line 77 of file scalar_check_approximation.cpp.

                                                       {
    FTensor::Tensor1<double, 3> r{0., 0., 0.};
    for (int o = 1; o <= approx_order; ++o) {
      for (int i = 0; i <= o; ++i) {
        for (int j = 0; j <= o - i; j++) {
          int k = o - i - j;
          if (k >= 0) {
            r(0) += i > 0 ? i * pow(x, i - 1) * pow(y, j) * pow(z, k) : 0;
            r(1) += j > 0 ? j * pow(x, i) * pow(y, j - 1) * pow(z, k) : 0;
            r(2) += k > 0 ? k * pow(x, i) * pow(y, j) * pow(z, k - 1) : 0;
          }
        }
      }
    }
    return r;
  }

fUn()

static double ApproxFunctionsImpl< 3 >::fUn ( const double  x, const double  y, double  z  )

inlinestatic

Definition at line 62 of file scalar_check_approximation.cpp.

                                                              {
    double r = 1;
    for (int o = 1; o <= approx_order; ++o) {
      for (int i = 0; i <= o; ++i) {
        for (int j = 0; j <= o - i; j++) {
          int k = o - i - j;
          if (k >= 0) {
            r += pow(x, i) * pow(y, j) * pow(z, k);
          }
        }
      }
    }
    return r;
  }

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The documentation for this struct was generated from the following file:

• atom_tests/scalar_check_approximation.cpp