Excel CUMIPMT. Funktion in Javascript

Question

Kann jemand die Excel CUMIPMT Funktion in Javascript implementieren. Ich habe diese code gefunden, aber es scheint einige Funktionen zu fehlen.

Answer 1

Diese Pseudo-Code ist, müssen Sie es anzupassen:

Object CUMIPMT(double rate, double nper, double pv, double start_period, double end_period, double type) 
     { 

      if (rate <= 0) 
      { 
       return "#NUM!"; 
      } 

      if (nper <= 0) 
      { 
       return "#NUM!"; 
      } 
      nper = (int)nper; 

      if (pv <= 0) 
      { 
       return "#NUM!"; 
      } 

      if (start_period < 1) 
      { 
       return "#NUM!"; 
      } 
      start_period = (int)start_period; 

      if (end_period < 1) 
      { 
       return "#NUM!"; 
      } 
      end_period = (int)end_period; 

      if (start_period > end_period) 
      { 
       return "#NUM!"; 
      } 

      if (!(type == 0 || type == 1)) 
      { 
       return "#NUM!"; 
      } 

      double value = 0; 
      for (int per = (int)start_period; per <= (int)end_period; per++) 
      { 
       value += IPMT(rate, nper, per, pv, 0, type); 
      } 

      return value; 
     } 

     double IPMT(double rate, double nper, double period, double pv, double fv, double type) 
     { 
      if (rate == 0) 
      { 
       return 0; 
      } 
      if (type == 1 && period == 1) 
      { 
       return 0; 
      } 
      double pmt = PMT(rate, nper, pv, fv, 0); 
      if (type == 0) 
      { 
       return (pv * Math.Pow(1.0 + rate, period - 1) + pmt * ((Math.Pow(1 + rate, period - 1) - 1)/rate)) * rate * (-1.0); 
      } 
      else 
      { 
       double pmt2 = PMT(rate, nper, pv, fv, 1); 
       return pmt2 - pmt + (pv * Math.Pow(1.0 + rate, period - 2) + pmt * ((Math.Pow(1 + rate, period - 2) - 1)/rate)) * rate * (-1.0); 
      } 

     } 

     double PMT(double rate, double nper, double pv, double fv, double type) 
     { 
      if (rate == 0) 
      { 
       return (-1.0) * (fv + pv)/nper; 
      } 
      else 
      { 
       return (-1.0) * 
         ((fv + pv * Math.Pow((1 + rate), nper)) * 
         rate/
         ((1 + rate * type) * (Math.Pow((1 + rate), nper) - 1)) 
        ); 
      } 
     }