IStatistics.StDevDcml

Fore Syntax

StDevDcml(Values: Array): Decimal;

Fore.NET Syntax

StDevDcml(Values: System.Array): decimal;

Parameters

Values. An array of decimal high-precision numbers corresponding to the sampling from universal set.

Description

The StDevDcml method estimates standard deviation by sample of the Decimal type.

Comments

Standard deviation is a degree that show how far data points are scattered from their mean. Standard deviation is calculated using unbiased or n-1 method.

To define numbers of the Decimal type in the array, it is necessary to write the "m" character after the value of each number. For example: 0.001m.

Fore Example

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

Sub UserProc;
Var
    st: Statistics;
    a: Array[5] Of Variant;
    s: Decimal;
Begin
    st := New Statistics.Create;
    a[0] := 0.85m;
    a[1] := 0.14m;
    a[2] := 0.53m;
    a[3] := 0.28m;
    a[4] := 0.31m;
    s:=st.StDevDcml(a);
    Debug.WriteLine("Standard deviation: " + s.ToString);
End Sub UserProc;

After executing the example the console window displays standard deviation value.

Fore.NET Example

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

Imports Prognoz.Platform.Interop.Stat;
…
Public Shared Sub Main(Params: StartParams);
Var
    st: Statistics;
    a: Array[5] Of object;
    s: decimal;
Begin
    st := New Statistics.Create();
    a[0] := 0.85m;
    a[1] := 0.14m;
    a[2] := 0.53m;
    a[3] := 0.28m;
    a[4] := 0.31m;
    s:=st.StDevDcml(a);
    System.Diagnostics.Debug.WriteLine("Standard deviation: " + s.ToString());
End Sub;