58 lines
1.6 KiB
C#
58 lines
1.6 KiB
C#
namespace EvoCalculator.Core.FinanceFormulas;
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public class Interpolation
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{
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private int[] values1 = { 7, 12, 18, 24, 36, 60 };
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private int[] percentages1 = { 60, 50, 40, 29, 25, 25 };
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private int[] percentages2 = { 45, 35, 30, 26, 25, 25 };
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private int[] percentages3 = { 35, 30, 27, 25, 25, 25 };
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private int[] values;
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private int[] percentages;
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public Interpolation(decimal PI)
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{
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switch (PI)
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{
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case >= 0.06m:
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values = values1;
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percentages = percentages1;
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break;
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case >= 0.03m and < 0.06m:
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values = values1;
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percentages = percentages2;
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break;
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default:
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values = values1;
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percentages = percentages3;
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break;
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}
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}
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public decimal Interpolate(decimal targetValue)
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{
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var lowerValue = values[0];
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var lowerPercentage = percentages[0];
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var higherValue = values[0];
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var higherPercentage = percentages[0];
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for (var i = 1; i < values.Length; i++)
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{
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if (values1[i] <= targetValue)
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{
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lowerValue = values[i];
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lowerPercentage = percentages[i];
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}
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else
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{
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higherValue = values[i];
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higherPercentage = percentages[i];
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break;
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}
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}
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var percentage = lowerPercentage + (higherPercentage - lowerPercentage) * (targetValue - lowerValue) /
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(higherValue - lowerValue);
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return percentage;
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}
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} |