HTM School Episode 6: Datetime Encoding

rhyolight · June 24, 2016, 4:15pm

cogmission · June 25, 2016, 10:32am

Very nice Matt. I’ll say it again, its been really nice to see all of the concepts laid out in front of us and to be able to visualize the different HTM components. Thanks again for another great addition!

Jonathan_Mackenzie · June 27, 2016, 7:57am

Thanks for the video, Matt. A question about the date encoder as implemented in Nupic’s OPF, when we specify an encoder using names like 'timestamp_weekend' and 'timestamp_timeOfDay', does the OPF internally concatenate these encodings like in the video? I ask because I was reading the source and couldn’t find where this happened:

https://github.com/numenta/nupic/blob/master/src/nupic/frameworks/opf/clamodel.py#L1071

rhyolight · June 27, 2016, 2:53pm

Yes @Jonathan_Mackenzie it does. In the constructor of the DateEncoder, it creates one periodic scalar encoder for each semantic meaning (depending on the input options). This is just like the example I showed in the video. I did mine in JavaScript, but I copied this code very closely:

github.com

numenta/nupic/blob/master/src/nupic/encoders/date.py#L69-L207


    - [1] (str | list) Either a string representing a day of the week like
      "Monday" or "mon", or a list of these strings.


:param forced: (default True) if True, skip checks for parameters' settings.
       See :class:`~.nupic.encoders.scalar.ScalarEncoder` for details.


"""




def __init__(self, season=0, dayOfWeek=0, weekend=0, holiday=0, timeOfDay=0, customDays=0,
              name = '', forced=True):


  self.width = 0
  self.description = []
  self.name = name


  # This will contain a list of (name, encoder, offset) tuples for use by
  #  the decode() method
  self.encoders = []

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HTM School Episode 6: Datetime Encoding

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