John Maddock wrote:
Matthias Troyer wrote:
This all leads on to the algorithms used for the mean and variance etc: I assume that these are of the "naive" variety? Perfectly satisfactory for simple cases, but there are well known pathological situations where these fail.
Very naive, yes. Actually tag::variance is the naive implementation while tag::variance (immediate) is a more accurate implementation.
OK I switched my torture test to use the "immediate" versions of the mean and variance, and got all the right answers :-) So with some suitable warnings in the documentation about which to use when, I'm happy now.
Whew! :-) Thanks for doing these tests, John.If you send me the latest and greatest, I'll turn it into a regression test. -- Eric Niebler Boost Consulting www.boost-consulting.com