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From: mesard@bbn.com (Wayne Mesard)
Newsgroups: comp.ai.neural-nets
Subject: Re: PDP programs not working for large nets?
Keywords: Neural Nets, PDP, pa
Message-ID: <36363@bbn.COM>
Date: 23 Feb 89 20:49:12 GMT
References: <539@tekno.chalmers.se> <2730@usceast.UUCP>
Sender: news@bbn.COM
Reply-To: mesard@BBN.COM (Wayne Mesard)
Organization: Bolt Beranek and Newman Inc., Cambridge MA
Lines: 35

In article <2730@usceast.UUCP> fenimore@usceast.UUCP (Fred Fenimore) writes:
> What we found with ours was that if you 
>use BP or PA, then you cannot use the block commands in the .net file.
>We tried it on a Vax 11/725 and a Apollo.  Both machines gave either
>a segmentation fault or out of memory error. We spent some time looking
>in the various files to see if we could find the error and to confirm
>that it was a real bug in the code or what.

Nonsense.  Here is the .net file from a net that ran for a over 24 hours
using BP:

    definitions:
    nunits 174
    ninputs 43
    noutputs 2
    nepochs 5000
    ecrit 0.04
    end
    network:
    %r 43 129 0 43
    %r 172 2 43 129
    end
    biases:
    %r 43 131
    end

This has worked on a Sun3/160 running SunOS 3.5 and on a Compaq running
MesSy-DOS. 

[Disclaimer:  Yes, I did have a reason for having so many hidden units.]

-- 
unsigned *Wayne_Mesard();   "What are THEY doing singing in a major key!?"
MESARD@BBN.COM
BBN, Cambridge, MA                               -DB on the Violent Femmes