我关注某个帖子(this,this和this),以便使用std :: vector作为样本来计算滚动均值。
我已经包含了numeric::functional
子图书馆的标题,以便使用向量
此代码无法编译
#include <cstdlib>
#include <boost/accumulators/numeric/functional/vector.hpp>
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/rolling_mean.hpp>
#include <boost/unordered_map.hpp>
#include <boost/smart_ptr.hpp>
#include <boost/assign/list_of.hpp>
using namespace std;
using namespace boost::accumulators;
typedef accumulator_set<vector<float>, tag::rolling_mean> RollingMeanAccumulator;
typedef boost::shared_ptr<RollingMeanAccumulator> RollingMeanAccumulatorPtr;
int main(int argc, char** argv) {
RollingMeanAccumulatorPtr ptr = RollingMeanAccumulatorPtr(new RollingMeanAccumulator(vector<float>(2), tag::rolling_window::window_size = 4));
const vector<float> v = boost::assign::list_of(2.0)(3.0);
(*ptr)(v);
rolling_mean(*(ptr));
return 0;
}
如果我评论这一行,它会编译
rolling_mean(*(ptr));
因此,检索价值似乎存在问题。我该如何解决这个问题?
我正在使用boost 1.48。
编辑:
@doctorlove在编译错误中注意到operator-=
错过了std::Vector
。我已经打开boost/accumulators/numeric/functional/vector.hpp
并且我已经看到此操作符的定义未命中。所以我已经在我的代码中添加了它以这种方式更改它(抱歉,如果它写得不好):
#include <cstdlib>
#include <boost/accumulators/numeric/functional/vector.hpp>
namespace boost { namespace numeric { namespace operators {
template<typename Left>
std::vector<Left> &
operator -=(std::vector<Left> &left, std::vector<Left> const &right)
{
BOOST_ASSERT(left.size() == right.size());
for(std::size_t i = 0, size = left.size(); i != size; ++i)
{
numeric::minus_assign(left[i], right[i]);
}
return left;
}
}}}
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/rolling_mean.hpp>
#include <boost/unordered_map.hpp>
#include <boost/smart_ptr.hpp>
#include <boost/assign/list_of.hpp>
using namespace std;
using namespace boost::accumulators;
typedef accumulator_set<vector<float>, tag::rolling_mean> RollingMeanAccumulator;
typedef boost::shared_ptr<RollingMeanAccumulator> RollingMeanAccumulatorPtr;
int main(int argc, char** argv) {
RollingMeanAccumulatorPtr ptr = RollingMeanAccumulatorPtr(new RollingMeanAccumulator(vector<float>(2), tag::rolling_window::window_size = 4));
const vector<float> v = boost::assign::list_of(2.0)(3.0);
(*ptr)(v);
rolling_mean(*(ptr));
return 0;
}
我在该标题中采用了operator+=
的定义并对其进行了调整。
我这样做是因为在this post中,用户说必须在累加器定义之前定义向量运算符。
但即使在这种情况下,我也无法编译它。