本文整理汇总了C++中VectorType::coeff方法的典型用法代码示例。如果您正苦于以下问题：C++ VectorType::coeff方法的具体用法？C++ VectorType::coeff怎么用？C++ VectorType::coeff使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类VectorType的用法示例。
在下文中一共展示了VectorType::coeff方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: s
template<typename VectorType> void vectorRedux(const VectorType& w)
{
using std::abs;
typedef typename VectorType::Index Index;
typedef typename VectorType::Scalar Scalar;
typedef typename NumTraits<Scalar>::Real RealScalar;
Index size = w.size();
VectorType v = VectorType::Random(size);
VectorType v_for_prod = VectorType::Ones(size) + Scalar(0.2) * v; // see comment above declaration of m1_for_prod
for(int i = 1; i < size; i++)
{
Scalar s(0), p(1);
RealScalar minc(numext::real(v.coeff(0))), maxc(numext::real(v.coeff(0)));
for(int j = 0; j < i; j++)
{
s += v[j];
p *= v_for_prod[j];
minc = (std::min)(minc, numext::real(v[j]));
maxc = (std::max)(maxc, numext::real(v[j]));
}
VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.head(i).sum()), Scalar(1));
VERIFY_IS_APPROX(p, v_for_prod.head(i).prod());
VERIFY_IS_APPROX(minc, v.real().head(i).minCoeff());
VERIFY_IS_APPROX(maxc, v.real().head(i).maxCoeff());
}
for(int i = 0; i < size-1; i++)
{
Scalar s(0), p(1);
RealScalar minc(numext::real(v.coeff(i))), maxc(numext::real(v.coeff(i)));
for(int j = i; j < size; j++)
{
s += v[j];
p *= v_for_prod[j];
minc = (std::min)(minc, numext::real(v[j]));
maxc = (std::max)(maxc, numext::real(v[j]));
}
VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.tail(size-i).sum()), Scalar(1));
VERIFY_IS_APPROX(p, v_for_prod.tail(size-i).prod());
VERIFY_IS_APPROX(minc, v.real().tail(size-i).minCoeff());
VERIFY_IS_APPROX(maxc, v.real().tail(size-i).maxCoeff());
}
for(int i = 0; i < size/2; i++)
{
Scalar s(0), p(1);
RealScalar minc(numext::real(v.coeff(i))), maxc(numext::real(v.coeff(i)));
for(int j = i; j < size-i; j++)
{
s += v[j];
p *= v_for_prod[j];
minc = (std::min)(minc, numext::real(v[j]));
maxc = (std::max)(maxc, numext::real(v[j]));
}
VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.segment(i, size-2*i).sum()), Scalar(1));
VERIFY_IS_APPROX(p, v_for_prod.segment(i, size-2*i).prod());
VERIFY_IS_APPROX(minc, v.real().segment(i, size-2*i).minCoeff());
VERIFY_IS_APPROX(maxc, v.real().segment(i, size-2*i).maxCoeff());
}
// test empty objects
VERIFY_IS_APPROX(v.head(0).sum(), Scalar(0));
VERIFY_IS_APPROX(v.tail(0).prod(), Scalar(1));
VERIFY_RAISES_ASSERT(v.head(0).mean());
VERIFY_RAISES_ASSERT(v.head(0).minCoeff());
VERIFY_RAISES_ASSERT(v.head(0).maxCoeff());
}