Returns the sum of the values and the sum of the squared values in an array.
procedure SumsAndSquares(const Data: array of Double; var Sum: Extended; var SumOfSquares: Extended);
SumsAndSquares(const array of Double Data, Extended Sum, Extended SumOfSquares);
SumsAndSquares returns the sum of the Data values in Sum and the sum of the squares in SumOfSquares. The data to sum is specified in the Data array parameter. In C++, Data_Size indicates the index of the last value (one less than the number of values in Data).
This function is faster than calculating the sums separately.
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