## VRfDiffSq

#### Routine

double VRfDiffSq (const float x1[], const float x2[], int N)

#### Purpose

Find the sum of squares of the differences for two float arrays

#### Description

This routine calculates the sum of the squares of the differences between corresponding elements of two float arrays,

           N-1                2
      e2 = SUM (x1[i] * x2[i]) .
           i=0

#### Parameters

<- double VRfDiffSq
  Sum of the squares of the element differences
-> const float x1[]
  Input array (N elements)
-> const float x2[]
  Input array (N elements)
-> int N
  Number of elements in the arrays (may be zero)

#### Author / revision

P. Kabal / Revision 1.7 2003/05/09

#### See Also

VRfDotProd

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