Always set default value for maxBoost to 1.0

[rhyolight]

As discussed by @subutai on HTM Forum:

maxBoost is described in the Spatial Pooler pseudocode [1]. As Alex Lavin mentions at the end of his post, boosting is, by definition, only useful for really long and complex data sources where you need to optimally allocate the SP columns. For most simple streaming tasks it can be set to 1.0.

To my knowledge, swarming does not explore different values of boosting, just uses a default value of 2.0. I think that default should be set to 1.0. There is an existing NuPIC ticket [2] to improve the various swarm parameters, and this should be one of them. There are other parameters that could be improved in swarming.

[1] https://numenta.com/assets/pdf/biological-and-machine-intelligence/0.4/BaMI-Spatial-Pooler.pdf
[2] #2829

[breznak]

@rhyolight got it in #3143 😉 maybe it needs a warning comment if we agree on that

[rhyolight]

maybe it needs a warning comment if we agree on that

What do you mean a warning comment?

[breznak]

That boosting should be set only for special datasets, and not for common time-series (that's what I understood from @subutai 's reply) where it may cause more harm than good