本文地址: http://blog.csdn.net/caroline_wendy/article/details/24623187
vector<>类型的数组, 计算均值和方差的最简方法.
代码:
double sum = std::accumulate(std::begin(resultSet), std::end(resultSet), 0.0); double mean = sum / resultSet.size(); //均值 double accum = 0.0; std::for_each (std::begin(resultSet), std::end(resultSet), [&](const double d) { accum += (d-mean)*(d-mean); }); double stdev = sqrt(accum/(resultSet.size()-1)); //方差
C++ - Vector 计算 均值(mean) 和 方差(variance)
原文地址:http://blog.csdn.net/caroline_wendy/article/details/24623187