Class: PubliSci::Writers::ARFF

Inherits:
Base
  • Object
show all
Defined in:
lib/publisci/writers/arff.rb

Instance Method Summary collapse

Methods inherited from Base

#codes, #dataSet, #dimensions, #handle_input, #measures, #observations, #repo_to_ruby, #turtle_to_ruby

Methods included from Analyzer

#check_integrity, #dirty?, #recommend_range, #recommend_range_strings

Methods included from RDFParser

#add_node, #bnode_value, #encode_value, #get_ary, #get_hashes, #is_complex?, #is_uri?, #load_string, #observation_hash, #sanitize, #sanitize_hash, #strip_prefixes, #strip_uri, #to_literal, #to_resource, #turtle_indent

Methods included from Query

#execute, #execute_from_file, #property_names, #property_values, #row_names, #vocabulary

Instance Method Details

#build_arff(relation, attributes, data, source) ⇒ Object

include PubliSci::Query include PubliSci::RDFParser include PubliSci::Analyzer



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# File 'lib/publisci/writers/arff.rb', line 8

def build_arff(relation, attributes, data, source)
  str = <<-EOS
% 1. Title: #{relation.capitalize} Database
%
% 2. Sources:
%    (a) Generated from RDF source #{source}
%
@RELATION #{relation}

EOS

  Hash[attributes.sort].map{|attribute,type|
    str << "@ATTRIBUTE #{attribute} #{type}\n"
  }

  str << "\n@DATA\n"
  data.map { |d| str << Hash[d[1].sort].values.join(',') + "\n" }

  str
end

#from_store(repo, dataset = nil, title = nil, verbose = false) ⇒ Object 



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# File 'lib/publisci/writers/arff.rb', line 61

def from_store(repo, dataset=nil, title=nil, verbose=false)
  # data = observation_hash(execute_from_file("observations.rq",repo,:graph,{"%{dataSet}"=>"<#{dataSet}>"}), true)

  dims = dimensions(repo,dataset)
  meas = measures(repo,dataset)
  data = observations(repo,dataset)
  codes = codes(repo,dataset)
  attributes = {}

  (dims | meas).map{|component|
    attributes[component] = case recommend_range(data.map{|o| o[1][component]})
      when "xsd:int"
        "integer"
      when "xsd:double"
        "real"
      when :coded
        if dims.include? component
          "{#{codes[component].join(', ')}}"
        else
          "string"
        end
      end
  }

  dataset = dataSet(repo) unless dataset
  title = dataset unless title
  build_arff(title,attributes,data,dataset)
end

#from_turtle(turtle_file, verbose = false) ⇒ Object 



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# File 'lib/publisci/writers/arff.rb', line 29

def from_turtle(turtle_file, verbose=false)
  puts "loading #{turtle_file}" if verbose
  repo = RDF::Repository.load(turtle_file)
  puts "loaded #{repo.size} statements into temporary repo" if verbose

  dims = dimensions(repo)
  meas = measures(repo)
  data = observations(repo)

  relation = dataSet(repo)
  codes = codes(repo)

  attributes = {}

  (dims | meas).map{|component|
    attributes[component] = case recommend_range(data.map{|o| o[1][component]})
      when "xsd:int"
        "integer"
      when "xsd:double"
        "real"
      when :coded
        if dims.include? component
          "{#{codes[component].join(', ')}}"
        else
          "string"
        end
      end
  }

  build_arff(relation, attributes, data, turtle_file)
end