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

sumofsquares

Return sum of squares of values

Declaration

Source position: math.pp line 407

function sumofsquares(

  const data: array of Single

):Float;

function sumofsquares(

  const data: PSingle;

  const N: Integer

):Float;

function sumofsquares(

  const data: array of Double

):Float;

function sumofsquares(

  const data: PDouble;

  const N: Integer

):Float;

function sumofsquares(

  const data: array of Extended

):Float;

function sumofsquares(

  const data: PExtended;

  const N: Integer

):Float;

Description

Sumofsquares returns the sum of the squares of the values in the data array.

The second form of the function accepts a pointer to an array of N values.

Errors

None.

See also

sum

  

Return sum of values

sumsandsquares

  

Return sum and sum of squares of values.

totalvariance

  

Return total varians of values

variance

  

Return variance of values

Example

Program Example45;

{ Program to demonstrate the SumOfSquares function. }
{ @ should return typed pointer }
{$T+}

Uses math;

Var
  I : 1..100;
  ExArray : Array[1..100] of Float;

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('Sum squares     : ',SumOfSquares(ExArray):8:4);
  Writeln('Sum squares (b) : ',SumOfSquares(@ExArray[1],100):8:4);
end.

Documentation generated on: Sep 28 2017