Eric Niebler
Eric Niebler wrote:
Robert Kubrick wrote:
I have the following program:
<snip>
Bin values and indexes don't seem to be initialized:
$ acc_dist Bin lower bound: 0, Value: 0 Bin lower bound: 0, Value: 0 Bin lower bound: 0, Value: 0 Bin lower bound: 0, Value: 0 Bin lower bound: 0, Value: 0 Bin lower bound: 0, Value: 0
I'm afraid I don't have time to investigate this right now. Please file a bug at https://svn.boost.org/trac/boost/ and be sure to state what you think the expected results should be. Thanks.
Addendum: if the number of samples is at least as great as the cache size, then it seems to work. I didn't actually write the density accumulator, so I'll need to check with the author to see if that's a precondition, or if there's some way we can return meaningful results with fewer samples. Matthias?
Still, a bug report would be good.
I changed the number of samples to 10, matching the original cache_size parameter. It works better: Bin lower bound: -0.445, Value: 0 Bin lower bound: 0.1, Value: 0.1 Bin lower bound: 0.645, Value: 0 Bin lower bound: 1.19, Value: 0.1 Bin lower bound: 1.735, Value: 0 Bin lower bound: 2.28, Value: 0.1 Bin lower bound: 2.825, Value: 0 Bin lower bound: 3.37, Value: 0.1 Bin lower bound: 3.915, Value: 0 Bin lower bound: 4.46, Value: 0.1 Bin lower bound: 5.005, Value: 0.3 Bin lower bound: 5.55, Value: 0 Bin lower bound: 6.095, Value: 0 Bin lower bound: 6.64, Value: 0 Bin lower bound: 7.185, Value: 0 Bin lower bound: 7.73, Value: 0 Bin lower bound: 8.275, Value: 0 Bin lower bound: 8.82, Value: 0 Bin lower bound: 9.365, Value: 0 Bin lower bound: 9.91, Value: 0.1 Bin lower bound: 10.455, Value: 0 Bin lower bound: 11, Value: 0.1 A couple of questions: 1) I have a real-time application that keeps track of some statistics based on the events received so the values can not be pre-determined. Statistics are reset by the application at regular time intervals. What happens if I leave the cache_size parameter to 1 and then keep adding samples? Is there a serious performance penalty? 2) Is there a way to reset the acc object in the example? Or do I have to deallocate the object and instantiate a new one to generate a new sampling?