IMath.SumX2MY2

Fore Syntax

SumX2MY2(X: Array; Y: Array): Double;

Fore.NET Syntax

SumX2MY2(X: System.Array; Y: System.Array): double;

Parameters

X. Array of real numbers.

Y. Array of real numbers.

Description

The SumX2MY2 method returns the sum of differences between squares of the corresponding values in two arrays.

Comments

The X and Y arrays must be equal in size.

The function works correctly with both one-dimension and two-dimension arrays.

Fore Example

To execute the example, add a link to the MathFin system assembly.

Sub UserProc;
Var
    r: Double;
    X: Array[7] Of Double;
    Y: Array[7] Of Double;
Begin
    X[0] := 2; Y[0] := 6;
    X[1] := 3; Y[0] := 5;
    X[2] := 9; Y[0] := 11;
    X[3] := 1; Y[0] := 7;
    X[4] := 8; Y[0] := 6;
    X[5] := 7; Y[0] := 4;
    X[6] := 5; Y[0] := 4;
    r := Math.SumX2MY2(X, Y);
    Debug.WriteLine(r);
End Sub UserProc;

After executing the example the console window displays the sum of square differences equal to 217.

Fore.NET Example

The requirements and result of the Fore.NET example execution match with those in the Fore example.

Imports Prognoz.Platform.Interop.MathFin;
…
Public Shared Sub Main(Params: StartParams);
Var
    r: double;
    Math: MathClass = New MathClass();
    X: Array[7] Of Double;
    Y: Array[7] Of Double;
Begin
    X[0] := 2; Y[0] := 6;
    X[1] := 3; Y[0] := 5;
    X[2] := 9; Y[0] := 11;
    X[3] := 1; Y[0] := 7;
    X[4] := 8; Y[0] := 6;
    X[5] := 7; Y[0] := 4;
    X[6] := 5; Y[0] := 4;
    r := Math.SumX2MY2(X, Y);
    System.Diagnostics.Debug.WriteLine(r);
End Sub;