JCL Help:SumPairProductFloatArray
JCL Help: SumPairProductFloatArray Function
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Summary
Returns the sum of the product of the elements.
Pascal
function SumPairProductFloatArray(const X: TDynFloatArray; const Y: TDynFloatArray): Float;
Parameters
| Parameters | Description |
| const X: TDynFloatArray | The first array. |
| const Y: TDynFloatArray | The second array. |
Return Value
The sum of the pairwise product of the elements or 0 if both arrays are empty.
Description
SumPairProductFloatArray returns the sum of the pairwise product of the elements of the two arrays. That is, it calculates: X[0]*Y[0] + X[1]*Y[1] + .. + X[N-1]*Y[N-1]. Note that N in the above formula is the highest common element of X and Y. Thus you can supply arrays with a different dimension in which case the function will only sum the product of the elements common to both arrays. For example, if X has a length 10 and Y has a length 20 then the summation will run from 0 to 9 only.
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