[pdp-discuss] writing out delta weight changes to file

[rama0042 at umn.edu]

Dear List,

I am having trouble writing out delta weight changes to a data file using 
the script language.

I want to make a list of all of the connection weight changes from one 
trial of learning to the next, for both the input-hidden and the 
hidden-output connections.

The first question I have is: are r.pdw and s.pdw the appropriate items if 
I want to access the *change* in weights from one trial to the next? I 
think the answer is yes, but I want to doublecheck.

More importantly, here is the main problem that I have:

I have no problem creating a textlog: I can create a log of r.pdw or s.pdw 
values, which it reports under a column titled, for example, 
"Hidd[0][0][0].pdw". However, I can't figure out how to access these 
values, either individually (eg: Hidd[0][0][1]), or in an iterative fashion 
(iterating over the indices) and write to an output file using the script 
language.

I've tried all kinds of variations on a line like this:

foutweightdeltas<<.processes[2].loop_stats[3].Hidd[i][j][k].pdw.val;

The error message says that there is no such monitorstat. So, I've also 
tried variations on this kind of thing:

foutweightdeltas<<.processes[2].loop_stats[3].sum_r.pdw_Hidd.val<<;

Again, it doesn't recognize this (calling it a syntax error, and choking on 
the "r.").

Any ideas?

Thanks,
Pradeep
-- 



Pradeep Ramanathan M.S., M.A., CCC-SLP
Speech-Language Pathologist/Doctoral Candidate
University of Minnesota