Re: [boost] accumulators::histogram

From: Eric Niebler (eric_at_[hidden])
Date: 2008-01-31 11:15:45

Neal Becker wrote:
> Eric Niebler wrote:
> 
>> Matthias Troyer wrote:
>>> On 30 Jan 2008, at 08:26, Neal Becker wrote:
>>>> I don't think that helps.  How can I specify apriori the number of
>>>>  bins and the min and max?  AFAICT, the above would let me do this
>>>> by forcing in some fake data, that has the effect of filling the
>>>> cache and thus setting num_bins, min, max, but is has the side
>>>> effect of causing that data to effect the histogram - which is not
>>>> what I need.
>>>>
>>>> Unless I misunderstand, we need another (simpler) class "histogram"
>>>>  that implements just this simpler behavior.  Perhaps density could
>>>> be build on top of it?
>>> It would indeed be nice to be able to explicitly specify the min and
>>>  max for the bins and I guess that should not be too hard to do.
>>> Eric, what do you think?
>> Sounds reasonable. I'm super-busy at the moment getting proto ready for
>> its upcoming review. I can add this to the list, or someone (Neal?) can
>> submit a patch which I would gladly accept.
> 
> I haven't gotten it working - I haven't learned about boost::parameter yet. 
> Someone familiar with that could probably finish this quickly.  Here is
> what I have so far:
<snip>

I took Matthias' suggestion above to mean he thought the density 
accumulator could be given additional "min" and "max" constructor 
parameters, not that we need a whole new accumulator. Matthias, was that 
what you were suggesting? I'd rather go that route.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com