Signature | Description |
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enum class mad_type : unsigned char { mean_abs_dev_around_mean = 1, // Mean of absolute distances from mean mean_abs_dev_around_median = 2, // Mean of absolute distances from median median_abs_dev_around_mean = 3, // Median of absolute distances from mean median_abs_dev_around_median = 4, // Median of absolute distances from median }; |
This defines different ways of calculating averages around averages, in other words different types of Mean Absolute Deviation. |
Signature | Description | Parameters |
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#include <DataFrame/DataFrameStatsVisitors.h> template<typename T, typename I = unsigned long> struct MADVisitor; // ------------------------------------- template<typename T, typename I = unsigned long> using mad_v = MADVisitor<T, I>; |
This is a “single action visitor”, meaning it is passed the whole data vector in one call and you must use the single_act_visit() interface. This functor class calculates 4 different forms of Mean Absolute Deviation. Please see mad_type enum definition above in the type section explicit MADVisitor(mad_type mt, bool skip_nan = true) |
T: Column data type I: Index type |
static void test_MADVisitor() { std::cout << "\nTesting MADVisitor{ } ..." << 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)); MADVisitor<double> mad_visitor1(mad_type::mean_abs_dev_around_mean); const auto result1 = df.single_act_visit<double>("col_1", mad_visitor1).get_result(); assert(result1 == 10.0); MADVisitor<double> mad_visitor2(mad_type::mean_abs_dev_around_median); const auto result2 = df.single_act_visit<double>("col_1", mad_visitor2).get_result(); assert(result2 == 10.0); MADVisitor<double> mad_visitor3(mad_type::median_abs_dev_around_mean); const auto result3 = df.single_act_visit<double>("col_1", mad_visitor3).get_result(); assert(result3 == 5.25); MADVisitor<double> mad_visitor4(mad_type::median_abs_dev_around_median); const auto result4 = df.single_act_visit<double>("col_1", mad_visitor4).get_result(); assert(result4 == 5.25); }