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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: ODF 1.2 Part 2 CD 1
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Component/s: OpenFormula
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Labels:None
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Proposal:
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Resolution:
Text under Semantics reads:
"Implementations should be wary of actually calculating PEARSON this way, due to numerical instability issues."
"...be wary..."? Perhaps a note, if it says what those "issues" may be.
BTW, in researching this function I found: http://www.statemaster.com/encyclopedia/Correlational-research
It may just be a presentation issue but does the square root on the denominator extend across both of the summation signs?
Oh, the resource I cite above alleges a better way to calculate this function with numeric stability.