Question

我有以下代码：

#include <boost/smart_ptr/shared_ptr.hpp>
#include <boost/numeric/interval.hpp>
#include <boost/math/distributions/students_t.hpp>

using namespace boost::numeric;
using namespace interval_lib;

unsigned int len=10;
 unsigned int v = len - 1;
  double sqrtlen = sqrt(double(len));
  students_t dist(v);
    double stdev = 0.2;
    double mean = 3;
    double t_stat = mean * sqrtlen / stdev;
    double q = cdf(complement(dist, std::fabs(t_stat)));

然而，当我编译时，我收到以下错误：

Tests.cpp:39:3: error: ‘students_t’ was not declared in this scope
Tests.cpp:39:14: error: expected ‘;’ before ‘dist’
Tests.cpp:45:31: error: ‘dist’ was not declared in this scope
Tests.cpp:45:54: error: ‘complement’ was not declared in this scope
Tests.cpp:45:55: error: ‘cdf’ was not declared in this scope

我不明白为什么当我包含适当的标题时它会抱怨。任何人都可以告诉我如何解决它。谢谢！

Answer 1

因为你没有包含好名称空间。来自doc：

因此，例如，名称空间中的Students-t分发模板 boost :: math 是

Link here

Answer 2

I think your namespace might be off.另一个通用指针：尽可能避免使用'using'指令，如果你有名字冲突，它们会导致一些非常难以调试的错误。

提升student_t分布

2 个答案: