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=begin
* Name: algorithm.rb
* Description: General algorithms
* Author: Andreas Maunz <andreas@maunz.de>
* Date: 10/2012
=end
module OpenTox
class Algorithm
# Minimum Frequency
# @param [Integer] per-mil value
# return [Integer] min-frequency
def self.min_frequency(training_dataset,prediction_feature,per_mil)
nr_labeled_cmpds=0
f_idx=training_dataset.features.collect{|f| f.uri}.index prediction_feature.uri
training_dataset.compounds.each_with_index { |cmpd, c_idx|
if ( training_dataset.data_entries[c_idx] )
unless training_dataset.data_entries[c_idx][f_idx].nil?
nr_labeled_cmpds += 1
end
end
}
minfreq = per_mil * nr_labeled_cmpds.to_f / 1000.0 # AM sugg. 8-10 per mil for BBRC, 50 per mil for LAST
minfreq = 2 unless minfreq > 2
Integer (minfreq)
end
end
end
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