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Author Topic: ParameterIteration  (Read 2538 times)
Tobias Malbrecht
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« on: June 01, 2008, 11:43:11 PM »

Original message from SourceForge forum at
http://sourceforge.net/forum/forum.php?thread_id=2060418&forum_id=390413


Hello All,

 
I am having a problem in applying a ParameterIteration operator rather than GridParameterOptimization. When i check the 
setup, i get the following error :
 
un 1, 2008 6:48:15 PM: Checking process setup...
P Jun 1, 2008 6:48:15 PM: Inner operators are ok.
P Jun 1, 2008 6:48:15 PM: Checking i/o classes...
P Jun 1, 2008 6:48:15 PM: [Error] ParameterSetWriter: ParameterSetWriter: ParameterSetWriter: Missing input: ParameterSet
P Jun 1, 2008 6:48:15 PM: [Error] There was 1 error.
 
 
I assume that the GridParameterOptimization operator outputs a ParameterSet, but the ParameterIteration operator does not. How can i solve this problem?
 
 
 
Many Thanks,
 
 
Harry
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Tobias Malbrecht
Director of Product Marketing
RapidMiner
Tobias Malbrecht
Global Moderator
Sr. Member
*****
Posts: 293



WWW
« Reply #1 on: June 01, 2008, 11:49:40 PM »

Hi Harry,

the ParameterIteration differs from the GridParameterOptimization in so far, as it does only repeatedly apply its inner operators without the intention to optimize the learning results by using different parameters. As a consquence it does not find a set of parameters which maximize the learning performance and hence it does not output a ParameterSet which could be written by the ParameterSetWriter. If you want to find such a set of optimal parameters you actually have to use an optimization operator such as the GridParameterOptimization or the EvolutionaryParameterOptimization.

Regards,
Tobias
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Tobias Malbrecht
Director of Product Marketing
RapidMiner
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