[pdp-discuss] TesselPrjnSpec usage

[Randall C. O'Reilly]

unless you are using rbp, you can't have a self-projection in bp -- it is 
feedforward only..

You did set the init_wts flag in the spec, and also set weight values in the 
individual tessel elements, right?  That should work, even if it doesnt' make 
sense to do it in bp..

Those functions are in the "Actions" menu of the tessel edit dialog..

- Randy

On Friday 13 October 2006 16:22, Richard Jones wrote:
> Hi,
>
> I'm trying to create a self-projection for a hidden layer using a
> TesselPrjnSpec.  I'd like to have a RF pattern along the lines of the
> one in the book's "v1rf" project in chapter 8.  However, I'd like each
> of my units to try and inhibit his near neighbors.
>
> bp++ allows me to assign the TesselPrjnSpec to the self-projection in
> question, and I can edit its properties.  However, after applying and
> doing a "Connect All" (or any of the other init buttons here and
> there) no non-zero weights are created.  It doesn't seem to matter
> which params I set in the properties editor.   If I assign other
> PrjnSpec types (e.g., PolarRndPrjnSpec) I get non-zero weights.
>
> I notice that in leabra++ with the v1rf project the TesselPrjnSpec
> does work.  Does it perhaps require that I use a LeabraConSpec instead
> of a BpConSpec?
>
> Lastly, the online help makes mention of functions associated with the
> TesselPrjnSpec (e.g., MakeEllipse(int half_width, int half_height, int
> ctr_x, int ctr_y)), but it's not clear whether this is something
> invoked automatically from the GUI, or if it's something that needs to
> be invoked from some code somewhere.
>
> How do I get that nice guassian cluster of weights around my sending unit?