void DenseVectorN::from(const VectorN &source)
{
int length = source.length();
x.resize({length}, 0.0);
Offsets offsets = source.getNonZeroOffsets();
for (Offset offset : offsets)
{
x[offset.first] = offset.second;
}
}
double DenseVectorN::dot(const VectorN& vec) const
{
if (vec.getType() == DENSE)
{
return ddot((const DenseVectorN&)vec);
}
auto acc = 0.;
for (auto offset : vec.getNonZeroOffsets())
{
acc += x[offset.first] * offset.second;
}
return acc;
}
