From: Manikantan Ramadas (mramadas@masaka.cs.ohiou.edu)
Date: 09/09/04
Date: Thu, 9 Sep 2004 12:05:29 -0400 From: Manikantan Ramadas <mramadas@masaka.cs.ohiou.edu> Subject: Re: tcptrace how to determine the size of training map in the Self-Organizing Map (SOM)? Message-ID: <20040909160529.GA3377@irg.cs.ohiou.edu>
Hi,
Let me tell you how I built/initialized my SOMs. This is one way of doing
it, and may be not be the only way, as I understand.
I used both SOM-PAK (C implementation) and SOM Toolbox (Matlab
implementation) from Helsinki Univ. of Tech. for my work. I used SOM Toolbox
for initialization and visualization purposes and SOM-PAK for the actual
training (it is much faster in C, compared to doing it in Matlab).
The som_lininit function in SOM Toolbox does the automatic generation and
choosing of the SOM dimensions. I believe the som_randinit function also
does this. I used the som_lininit function for my work. You probably want to
read up on som_lininit here :
http://www.cis.hut.fi/projects/somtoolbox/package/docs2/som_lininit.html or
even better, read the som_lininit.m file containing the implementation
written in Matlab language for more information on the actual design/working.
Good luck,
Mani.
On Wed, Sep 08, 2004 at 11:43:01PM -0700, Lau Ker Chea wrote:
> hello,
>
> now i am using the SOM-PAK software to do my research in anomaly detection for IDS system. i don know how to determine the size of the training map based on the amount of training data. how to know that the size of the map is enough to make the system produced accurate result?
>
> thanks a lot for all ur response....
>
> ker chea
>
>
>
> ---------------------------------
> Do you Yahoo!?
> Yahoo! Mail - Helps protect you from nasty viruses.
-- "'Beauty is truth, truth beauty,'--that is all Ye know on earth, and all ye need to know." - John Keats ____________________________________________________________________ * Manikantan Ramadas * IRG, OU * http://irg.cs.ohiou.edu/~mramadas * ____________________________________________________________________
----------------------------------------------------------------------------
To unsubscribe, send a message with body containing "unsubscribe tcptrace" to
majordomo@tcptrace.org.
This archive was generated by hypermail 2.1.7 : 09/10/04 EDT