Subject: ANN_Error Goal From: Suresh Date: 10 Feb, 2013 13:34:09 "Suresh" wrote in message <firstname.lastname@example.org>... > Dear Greg, > As you told I am following these steps to estimate Error goal for an example set. > >[I N]=size(Input);[13x178] > >[O N]=size(Target);[3x178] > From the size of above matrices > >I = 13 ; O = 3 ;N = 178 ; H =10
Did H=10 come out of midair?
If you do not use validation stopping or regularization, (e.g.,msereg) Neq > Nw is required. This results in the upper bound
Hub = -1 + ceil( (Neq-O)/(I+O+1)) = 31
To mitigate measurement error and noise, Neq >> Nw is desired. A reasonable first try in a search for a practical value is
H ~ round(Hub/10) = 3
Design Ntrials ~ 10 random initial weight designs. If unsuccessfull, increase H. However I would not exceed ~ Hub/2 ~ 15 unless using valstopping or regularization.
If you use valstopping or regularization, you can even use H > Hub. However, I find those values esthetically displeasing.