That seems very simple. It basically concatenates the SDRs created by the child encoders into a larger SDR. --------- Matt Taylor OS Community Flag-Bearer Numenta
On Thu, Sep 17, 2015 at 10:01 AM, cogmission (David Ray) <[email protected]> wrote: > Hi, > > I can't speak to questions concerning the OPF, but I am familiar with the > MultiEncoder in general. > > If you think of the MultiEncoder like an aggregate container, which is the > parent of other encoders - you will kind of understand what the MultiEncoder > is. If functions by providing a single place to call "encode()" from, and it > then delegates the encoding of multiple fields and multiple field types to > the "child" encoders it contains. For each field in a csv (comma separated > values) file, an indicator as to the type of the field is specified. Each > field type then corresponds with a child encoder contained within the > MultiEncoder. The ME then encodes each field type by iterating over all the > fields and passing each field to the child encoder in charge of encoding > that portion of the CSV line. > > For instance: > > Given a line in a CSV file such as: "2015-09-17, 0.007, License to kill" > > There would be 3 child encoders within the MultiEncoder: DateEncoder, > ScalarEncoder or RDSE, CategoryEncoder or SDRCategoryEncoder. > > In the loop, the "child" encoder is handed the field and the portion of the > output SDR that it is in charge of encoding. So if the output SDR is > configured to be 15 bits wide and each encoder was in charge of 5 bits, the > DateEncoder would be in charge of bit 0-4, the ScalarEncoder would be in > charge of bits 5-9, and the CategoryEncoder would be in charge of 10-14 - > adding up to 15 bits in total. Each child encoder's encoding would be > concatenated together at the end of the method, then returned as an entire > 15 bit encoding... > > Does that help? > > Cheers, > David > > On Thu, Sep 17, 2015 at 11:32 AM, Matthew Taylor <[email protected]> wrote: >> >> Hello NuPIC, >> >> I've seen several questions and references to NuPIC's MultiEncoder >> recently that I haven't been able to answer or comment on, because >> I've never used it. So this question is for anyone who's actually used >> a MultiEncoder for something practical. >> >> What is the typical use-case for a MultiEncoder? Is this something for >> experimentation, or is there a practical reason we might use it for >> combining real-world input data? I see that it is used in some of the >> Network API examples in "examples/network", but can it also be used in >> the OPF? >> >> Thanks in advance, >> --------- >> Matt Taylor >> OS Community Flag-Bearer >> Numenta >> > > > > -- > With kind regards, > > David Ray > Java Solutions Architect > > Cortical.io > Sponsor of: HTM.java > > [email protected] > http://cortical.io
