IStatistics.Quartile

Syntax

Quartile(Data: Array; Quart: Integer): Double;

Parameters

Data. Interval of numeric values related to probabilitites. Values of data array must be positive;

Quart. The value to be returned. Available values are taken from the range [0, 4].

If Quart equals to	Quartile returns
0	Minimum value.
1	First quartile (25-th percentile).
2	Median value (50-th percentile).
3	Third quartile (75th percentile).
4	Maximum value.

Description

The Quartile method returns the data set quartile.

Comments

The quartile is often used for sales analysis to split a universal set into groups.

Example

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

Sub UserProc;
Var
    st: Statistics;
    d0: Double;
    y: Array Of Double;
Begin
    y := New Double[7];
    y[00] := 6;
    y[01] := 7;
    y[02] := 9;
    y[03] := 15;
    y[04] := 21;
    y[05] := 24;
    y[06] := 25;
    st := New Statistics.Create;
    d0 := st.Quartile(y,1);
    Debug.WriteLine("First quartile: " + d0.ToString);
End Sub UserProc;

Executing the example shows the specified quartile in the console window:

Unit execution started

First quartile: 8

Unit execution finished