More accurate sum
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- Date Added: 23/08/2010
- File size: 1KB
- Downloads: 75
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More accurate sum Description
- "Built-in"sum"function, as well as add.reduce functions in Numeric/numarray." Brothersoft Editor: Built-in"sum"function, as well as add.reduce functions in Numeric/Numarray introduce a large error when summing large arrays of like elements. I got relative error of about 1e-9 after summing 10 million doubles Between 0 and 1. Function below has error less than 1e-15, doesn't use any additional memory (although it destroys the data array), and also runs asymptotically FASTER for unlimited Precision numbers. . you can
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