public void OnDataPoints_InterpolationExact()
{
LinearInterpolation1D interpolation = new LinearInterpolation1D(
new double[] { -3.1, 0.5, 4, 7.3 },
new double[] { 23.3, -234.5, 45.4, -0.497 });
AssertHelper.AssertApproximatelyEqual(23.3, interpolation.GetValue(-3.1));
AssertHelper.AssertApproximatelyEqual(-234.5, interpolation.GetValue(0.5));
AssertHelper.AssertApproximatelyEqual(45.4, interpolation.GetValue(4));
AssertHelper.AssertApproximatelyEqual(-0.497, interpolation.GetValue(7.3));
}
public void GivenSineValues_InterpolateLinear()
{
LinearInterpolation1D interpolation = new LinearInterpolation1D(
new double[] { -4, -3, 0, 1, 5, 8, 9 },
new double[] { Math.Sin(-4), Math.Sin(-3), Math.Sin(0), Math.Sin(1), Math.Sin(5), Math.Sin(8), Math.Sin(9) });
AssertHelper.AssertApproximatelyEqual(Math.Sin(-4), interpolation.GetValue(-4));
AssertHelper.AssertApproximatelyEqual(Math.Sin(-3) / 1.5, interpolation.GetValue(-2));
AssertHelper.AssertApproximatelyEqual(Math.Sin(0), interpolation.GetValue(0));
AssertHelper.AssertApproximatelyEqual((Math.Sin(5) + 3 * Math.Sin(1)) / 4.0, interpolation.GetValue(2));
AssertHelper.AssertApproximatelyEqual((3 * Math.Sin(5) + Math.Sin(1)) / 4.0, interpolation.GetValue(4));
AssertHelper.AssertApproximatelyEqual((Math.Sin(8) + 2 * Math.Sin(5)) / 3.0, interpolation.GetValue(6));
AssertHelper.AssertApproximatelyEqual((Math.Sin(9) + Math.Sin(8)) / 2.0, interpolation.GetValue(8.5));
}
public void ThrowIf_ArgumentOutOfRange()
{
LinearInterpolation1D interpolation = new LinearInterpolation1D(
new double[] { 1, 2, 3 }, new double[] { 1, 2, 3 });
interpolation.GetValue(-1);
}
public void GivenLinearInput_InterpolationExact()
{
LinearInterpolation1D interpolation = new LinearInterpolation1D(
new double[] { -4, -3, 0, 1, 5 },
new double[] { -6, -4, 2, 4, 12 });
AssertHelper.AssertApproximatelyEqual(-6, interpolation.GetValue(-4));
AssertHelper.AssertApproximatelyEqual(-4, interpolation.GetValue(-3));
AssertHelper.AssertApproximatelyEqual(-2, interpolation.GetValue(-2));
AssertHelper.AssertApproximatelyEqual(0, interpolation.GetValue(-1));
AssertHelper.AssertApproximatelyEqual(2, interpolation.GetValue(0));
AssertHelper.AssertApproximatelyEqual(4, interpolation.GetValue(1));
AssertHelper.AssertApproximatelyEqual(6, interpolation.GetValue(2));
AssertHelper.AssertApproximatelyEqual(8, interpolation.GetValue(3));
AssertHelper.AssertApproximatelyEqual(10, interpolation.GetValue(4));
AssertHelper.AssertApproximatelyEqual(12, interpolation.GetValue(5));
}
private double GetDisplacementRMS(
double temperature
)
{
return(InterpolatedDisplacementRMS.GetValue(temperature, 0, 0));
}