59 lines
2.0 KiB
C#
59 lines
2.0 KiB
C#
using System;
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using System.Linq;
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using EvoCalculator.Core.FinanceFormulas;
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using EvoCalculator.Core.Models.Calculation.Models.Prepared;
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using TridentGoalSeek;
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namespace EvoCalculator.Core.Calculation.Columns
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{
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public class SumColumn : BaseColumnWithXIRR, IGoalSeekAlgorithm
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{
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private readonly PreparedValues _preparedValues;
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private readonly PercentPaymentColumn _percentPaymentColumn;
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public SumColumn(int count, DateTempColumn dateTempColumn
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, PreparedValues preparedValues
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, PercentPaymentColumn percentPaymentColumn) : base(count, dateTempColumn)
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{
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this._preparedValues = preparedValues;
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this._percentPaymentColumn = percentPaymentColumn;
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}
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public void ComputeValues(double x)
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{
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Values[0] = -this._preparedValues.BaseCost;
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Values[1] = this._preparedValues.FirstPaymentSum;
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for (var i = 2; i < Values.Length - 1; i++)
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{
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Values[i] = x * _percentPaymentColumn.Values[i] / 100;
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}
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Values[^1] = _preparedValues.LastPaymentSum;
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}
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public decimal Calculate(decimal inputVariable)
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{
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var x = Convert.ToDouble(inputVariable);
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this.ComputeValues(x);
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var XIRR = new XIRR(Flows);
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IRR = XIRR.GetResult();
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return Convert.ToDecimal(IRR);
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}
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public void ComputeValues(decimal requiredIRR)
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{
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var goalSeek = new GoalSeek(this);
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goalSeek.SeekResult(requiredIRR,
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new GoalSeekOptions(
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startingStabPoint: Convert.ToDecimal(this._preparedValues.BaseCost / this._preparedValues.Nmper)
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, tineExplorePercentage: 10
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// , maximumAttempts: 10000
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// , initialTineSpacing: 1
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// , focusPercentage: 100
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// , trimFinalInputValue: true
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));
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}
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}
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} |