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module Lib
class FeatureUtil
# this derieves the predicted_variable and predicted_confidence in prediction dataset
# predicted_variable: the feature-uri of model predictions
# predicted_confidence: the feature-uri of the model prediction confidence
# according to API info should be available in the API
# problem: IST has no feature-service -> predicted_variable depends on prediction dataset
#
# PENDING: ambit and ist declare prediction features differently -> unify
#
def self.predicted_variables( model, prediction_dataset_uri, subjectid=nil )
predicted_variable = nil
predicted_confidence = nil
if model.metadata[OT.predictedVariables]
predictedVariables = model.metadata[OT.predictedVariables]
if predictedVariables.is_a?(Array)
if (predictedVariables.size==1)
predicted_variable = predictedVariables[0]
elsif (predictedVariables.size==2)
# PENDING identify confidence
conf_index = -1
predictedVariables.size.times do |i|
conf_index = i if OpenTox::Feature.find(predictedVariables[i]).metadata[DC.title]=~/(?i)confidence/
end
raise "size=2, no confidence "+predictedVariables.inspect+" "+model.uri.to_s if conf_index==-1
predicted_variable = predictedVariables[1-conf_index]
predicted_confidence = predictedVariables[conf_index]
else
raise "size>2 "+predictedVariables.inspect+" "+model.uri.to_s
end
else
raise "predictedVariables is no array"
end
end
unless predicted_variable
d = OpenTox::Dataset.new prediction_dataset_uri
d.load_features(subjectid)
d.features.keys.each do |f|
if d.features[f][OT.hasSource]==model.uri
# PENDING identify confidence
if f =~ /(?i)confidence/
raise "duplicate confidence feature, what to choose?" if predicted_confidence!=nil
predicted_confidence = f
elsif d.features[f][RDF.type].include? OT.ModelPrediction
raise "duplicate predicted variable, what to choose?" if predicted_variable!=nil
predicted_variable = f
end
end
end
raise "could not estimate predicted variable, model: '"+model.uri.to_s+"', prediction_dataset: '"+
prediction_dataset_uri.to_s+"'" unless predicted_variable
end
{:predicted_variable => predicted_variable, :predicted_confidence => predicted_confidence}
end
end
end
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