Interpolation.Linear Method

public static double Linear(
	double[] xValues,
	double[] yValues,
	double x,
	OutOfRangeMode outOfRangeMode = OutOfRangeMode.Throw,
	double fillValue = NaN
)

Public Shared Function Linear ( 
	xValues As Double(),
	yValues As Double(),
	x As Double,
	Optional outOfRangeMode As OutOfRangeMode = OutOfRangeMode.Throw,
	Optional fillValue As Double = NaN
) As Double

public:
static double Linear(
	array<double>^ xValues, 
	array<double>^ yValues, 
	double x, 
	OutOfRangeMode outOfRangeMode = OutOfRangeMode::Throw, 
	double fillValue = NaN
)

static member Linear : 
        xValues : float[] * 
        yValues : float[] * 
        x : float * 
        ?outOfRangeMode : OutOfRangeMode * 
        ?fillValue : float 
(* Defaults:
        let _outOfRangeMode = defaultArg outOfRangeMode OutOfRangeMode.Throw
        let _fillValue = defaultArg fillValue NaN
*)
-> float 

Parameters

xValues  Double[]

The x-coordinates of the data points. Must be strictly increasing.

yValues  Double[]

The y-coordinates of the data points.

x  Double

The x-coordinate at which to interpolate.

outOfRangeMode  OutOfRangeMode  (Optional)

Specifies how to handle x-values outside the interpolation range.

fillValue  Double  (Optional)

The value to return when outOfRangeMode is Fill and x is out of range.

Return Value

This method performs no allocations and is suitable for single-point evaluation. For repeated evaluations on the same data, consider using PiecewiseLinearCurve(Double[], Double[]) to create a reusable curve object.

The outOfRangeMode parameter controls behavior when x is outside [xValues[0], xValues[n-1]]:

• Throw: Throws an exception (default).
• Clamp: Returns the value at the nearest endpoint.
• Fill: Returns fillValue.

Reference