HP calcs are really not that accurate..

[AlexFekken]

(12-03-2017 09:53 PM)Thomas Okken Wrote:  How would you automate calculation with intervals? Without knowing the actual distribution of each variable, and without knowing which ones are independent and which ones are not, those calculations would be meaningless.

You are right, it is not that straightforward.

Which is why I (sneakily) switched from talking about error margins to interval arithmetic. Interval arithmetic should not be a problem (technically) and it should at least give you a rough idea of how fast errors could be propagating. Better than lying with either hidden digits or unknown rounding errors.