Re: [Boost-users] [accumulators] "count" NaN but otherwise ignore it?

Subject: Re: [Boost-users] [accumulators] "count" NaN but otherwise ignore it?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2014-01-29 15:08:11

AMDG

On 01/29/2014 11:02 AM, Rhys Ulerich wrote:
> Is there a feature within accumulators to count NaNs on extraction but
> to otherwise ignore them?  Maybe some sort of pass filter on incoming
> data?  I've got a situation where I'd like to avoid NaNs clobbering
> otherwise useful information, but I still want to total count of data
> seen to include them.
> 
> The context is a time integrator for a physics simulation.  The
> integrator tracks the number of timesteps.  When the physics kicks
> back a NaN (because something's amiss), I'd like to count the failed
> timestep but not have the NaN destroy the useful mean of timesteps
> taken thus far.
> 

This behavior of count would break
any accumulator that depends on count
(e.g. mean).

In Christ,
Steven Watanabe