sig_utils.hpp

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// toolboxes/signal/include/nk/signal/measurements/sig_utils.hpp
#pragma once
 
#include <memory_resource>
#include <nk/value/value.hpp>
 
#include <utility>
 
namespace nk::signal {

 

std::pair<Value, Value>
seqperiod(const Value &                x,
          double                       tol = 0.0,
          std::pmr::memory_resource *  mr  = nullptr);

std::pair<Value, Value>
zerocrossrate(const Value &                x,
              double                       level = 0.0,
              std::pmr::memory_resource *  mr    = nullptr);

struct CusumResult {
    Value iupper;    
    Value ilower;    
    Value uppersum;  
    Value lowersum;  
};

CusumResult cusum(const Value &x, double climit = 5.0, double mshift = 1.0,
                  const Value &tmean = Value::Empty,
                  const Value &tdev = Value::Empty,
                  std::pmr::memory_resource *mr = nullptr);
 

} // namespace nk::signal