Investigate why swarms pick up constant fields about nupic HOT 4 OPEN

@subutai This seemed like a pretty big deal before we OSed NuPIC. Do you agree that it is still important?

from nupic.

Can you explain what is meant by a 'constant field'?
Eg. class SP(var1=1, const2=2)
or
x,sinx,const
0,0,1
0.1,0.05,1
?

Also

Check whether 0.2% improvement is sufficient to include a field.
could this be part of swarming too? eg.
considerableSwarmingImprovement=swarmFloat(0.1, 0.4) ?

On Wed, Aug 20, 2014 at 11:16 PM, Matthew Taylor [email protected]
wrote:

@subutai https://github.com/subutai This seemed like a pretty big deal
before we OSed NuPIC. Do you agree that it is still important?

—
Reply to this email directly or view it on GitHub
#323 (comment).

Marek Otahal :o)

from nupic.

A constant field meaning the value for that column of input data does not change over time.

from nupic.

@rhyolight It's a corner case. Because there is some randomness, sometimes a constant field ends up adding positive contributions. This is particularly true if we don't have much data or if the algorithm is not doing that well anyway.

@breznak I think that is actually a parameter to swarming. Swarming wouldn't include a field unless it improved the error by at least that amount. There is some way to specify this - not sure how.

from nupic.