Delphi Basics : Mean command

DelphiBasics

Mean
Function

Gives the average for a set of numbers

Math unit

function Mean(const DataArray array of Double):Extended;

Description

The Mean function returns the average of a set of Double values in a DataArray.

Related commands

Max		Gives the maximum of two integer values
Min		Gives the minimum of two integer values
CompareValue		Compare numeric values with a tolerance

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Example code : Calculate the mean of a set of 5 numbers

var
  numbers         : array[1..5] of Double;
  aveVal, meanVal : Double;

begin
  // Set up the array of 5 floating point numbers
  numbers[1] :=  1.0;
  numbers[2] :=  2.5;
  numbers[3] :=  3.0;
  numbers[4] :=  4.5;
  numbers[5] := 25.0;

  // Calculate the average of these numbers
  aveVal := (numbers[1] + numbers[2] + numbers[3] +
             numbers[4] + numbers[5]) / 5;

  // Calculate the mean of these numbers
  meanVal := Mean(numbers);

  // Show these values
  ShowMessage('Average = '+FloatToStr(aveVal));
  ShowMessage('Mean    = '+FloatToStr(meanVal));
end;

Show full unit code

Average = 7.2
Mean = 7.2