[R] How to fix false positve rates?

From: Anderson de Rezende Rocha <phiberoptic_br_at_yahoo.com.br>
Date: Wed 15 Jun 2005 - 04:01:15 EST

Dear R-users,

I have a set of 12000 image samples. I can divide this set into two categories: training and testing. I need to classify the test set into a two qualitative outputs: true or false for some characteristic.

To do the classification I'm using the packages SVM in e1071 library and LDA in the MASS library. However, I'm with a great number of FALSE POSITIVE CASES in both classifiers, about 10/15%.

  1. How can I use these classifiers with a fixed 1% FALSE POSITIVE RATE?
  2. Could anynone indicate me a non-linear SVM classifier R-package?
  3. Could anynone indicate me an ADA-BOOST classifier R-package?

Thanks for all. I'm anxiously wait the answers. Best regards.

|Üñð뮧µñ| - Anderson de Rezende Rocha
Bacharel em Ciência da Computação - UFLA Mestrando em Ciência da Computação - UNICAMP Esteganografia e esteganálise digital
UNIVERSIDADE ESTADUAL DE CAMPINAS, SP - BRASIL < http://andersonrocha.cjb.net >

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Jun 15 04:55:25 2005

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