C++ (Cpp) logarithm Examples

Example #1

File: neuralnetwork.cpp Project: cuvidk/yet-another-neural-network-classifier

double NeuralNetwork::computeCost(const arma::mat& input, const arma::mat& output, const std::vector<arma::mat>& theta)
{
    arma::mat h =  feedForward(input, theta);
    arma::mat h_1 = 1 - h;
    unsigned int m = input.n_rows;
    double cost = (-1.0 / m) * arma::accu(output % logarithm(h) + (1 - output) % logarithm(h_1));
    return cost + (m_regFactor / (2.0 * m)) * computeRegTerm(theta);
}

Example #2

File: derivative.cpp Project: justloong/ArithMax

void
dpower(void)
{
    push(caddr(p1));	// v/u
    push(cadr(p1));
    divide();

    push(cadr(p1));		// du/dx
    push(p2);
    derivative();

    multiply();

    push(cadr(p1));		// log u
    logarithm();

    push(caddr(p1));	// dv/dx
    push(p2);
    derivative();

    multiply();

    add();

    push(p1);		// u^v

    multiply();
}

Example #3

File: ExpMapQuaternion.cpp Project: fdarricau/manifolds

 void ExpMapQuaternion::pseudoLog_(RefVec out, const ConstRefVec& x, const ConstRefVec& y)
 {
   Eigen::Vector4d tmp;
   toQuat q(tmp.data());
   const toConstQuat xQ(x.data());
   const toConstQuat yQ(y.data());
   q = xQ.inverse()*yQ; //TODO double-check that formula
   logarithm(out,tmp);
 }

Example #4

File: decimal128.cpp Project: EvgeniyPatlan/percona-server-mongodb

Decimal128 Decimal128::logarithm(const Decimal128& other, RoundingMode roundMode) const {
    std::uint32_t throwAwayFlag = 0;
    if (other.isEqual(Decimal128(2))) {
        BID_UINT128 current = decimal128ToLibraryType(_value);
        current = bid128_log2(current, roundMode, &throwAwayFlag);
        return Decimal128{libraryTypeToValue(current)};
    }
    if (other.isEqual(Decimal128(10))) {
        BID_UINT128 current = decimal128ToLibraryType(_value);
        current = bid128_log10(current, roundMode, &throwAwayFlag);
        return Decimal128{libraryTypeToValue(current)};
    }
    return logarithm(other, &throwAwayFlag);
}

Example #5

File: mcppInterface.cpp Project: Pyomo/pyomo

 MC *new_logarithm(MC *ptr1)
 {
     MC *ans = logarithm(ptr1);
     return ans;
 }

Example #6

File: decimal128.cpp Project: EvgeniyPatlan/percona-server-mongodb

Decimal128 Decimal128::logarithm(const Decimal128& other,
                                 std::uint32_t* signalingFlags,
                                 RoundingMode roundMode) const {
    return logarithm(signalingFlags, roundMode).divide(other);
}

Example #7

File: decimal128.cpp Project: EvgeniyPatlan/percona-server-mongodb

Decimal128 Decimal128::logarithm(RoundingMode roundMode) const {
    std::uint32_t throwAwayFlag = 0;
    return logarithm(&throwAwayFlag);
}

Example #8

File: ExpMapQuaternion.cpp Project: fdarricau/manifolds

 void ExpMapQuaternion::pseudoLog0_(RefVec out, const ConstRefVec& x)
 {
   logarithm(out,x);
 }