Signature Description Parameters
#include <DataFrame/DataFrameStatsVisitors.h>

template<typename T,
         typename I = unsigned long,
         typename =
             typename std::enable_if<std::is_arithmetic<T>::value, T>::type>
struct SampleZScoreVisitor;
        
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 the z-score of a sample against its population. It requires two columns. The first column is taken as population and the seconds column as sample. Its result a single value.
T: Column data type.
I: Index type.