[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'Math' (#rtl)

Mean

Return mean value of array

Declaration

Source position: math.pp line 423

function Mean(

  const data: array of Single

):Float;

function Mean(

  const data: PSingle;

  const N: LongInt

):Float;

function Mean(

  const data: array of Double

):Float;

function Mean(

  const data: PDouble;

  const N: LongInt

):Float;

function Mean(

  const data: array of Extended

):Float;

function Mean(

  const data: PExtended;

  const N: LongInt

):Float;

function Mean(

  const data: PInt64;

  const N: LongInt

):Float;

function Mean(

  const data: array of Int64

):Float;

function Mean(

  const data: PInteger;

  const N: LongInt

):Float;

function Mean(

  const data: array of Integer

):Float;

Description

Mean returns the average value of data. The second form accepts a pointer to an array of N values.

Errors

None.

See also

meanandstddev

  

Return mean and standard deviation of array

momentskewkurtosis

  

Return 4 first moments of distribution

sum

  

Return sum of values

Example

Program Example27;

{ Program to demonstrate the Mean function. }
{ @ should return typed pointer }
{$T+}
Uses math;

Type
  TExArray = Array[1..100] of Float;

Var
  I : Integer;
  ExArray : TExArray;

begin
  Randomize;
  for I:=low(ExArray) to high(ExArray) do
    ExArray[i]:=(Random-Random)*100;
  Writeln('Max      : ',MaxValue(ExArray):8:4);
  Writeln('Min      : ',MinValue(ExArray):8:4);
  Writeln('Mean     : ',Mean(ExArray):8:4);
  Writeln('Mean (b) : ',Mean(PExtended(@ExArray[1]),100):8:4);
end.
Documentation generated on: May 14 2021