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

# mean

Return mean value of array

## Declaration

Source position: line 0

`function mean(`
`const data: array of Extended`
`):float; function mean(`
`const data: PExtended;`
`const N: LongInt`
`):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. }

    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(@ExArray[1],100):8:4);
    end.

Documentation generated on: Feb 26 2014