Signature | Description | Parameters |
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#include <DataFrame/DataFrameStatsVisitors.h> template<typename T, typename I = unsigned long> struct SEMVisitor; // ------------------------------------- template<typename T, typename I = unsigned long> using sem_v = SEMVisitor<T, I>; |
This functor class calculates the Standard Error of the Mean for a given column.explicit SEMVisitor (bool bias = true); |
T: Column data type. I: Index type. |
static void test_SEMVisitor() { std::cout << "\nTesting SEMVisitor{ } ..." << std::endl; std::vector<unsigned long> idx = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 }; std::vector<double> d1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 }; MyDataFrame df; df.load_data(std::move(idx), std::make_pair("col_1", d1)); SEMVisitor<double> sem_visitor; const auto result = df.visit<double>("col_1", sem_visitor).get_result(); assert(fabs(result - 1.84842) < 0.00001); }