Class: SVMFeaturesConfig

Inherits:
Hash
  • Object
show all
Defined in:
lib/svmlab-config.rb

Overview

—SVMFeature configuration—

SVMFeature is initiated by a configuration file in YAML format. Required fields in configuration are: (all paths can be given either absolute or relative to BaseDir)

Features:

  • <targetfeature>

  • <feature1>

  • <feature2>

… BaseDir: <base directory> DataSet: <path of file giving the dataset>

 OR
<prefix of a set of files giving the dataset>

Example: If Dataset is not given, this gives name(s) of examples

to use.

Groups: <range (n1..n2) or (n1…n2) in example name to use for grouping>

 OR
<file prefix relative to BaseDir for files giving groups>

Methods: <path of .rb file holding all feature calculation methods>

targetfeature:

HomeDir: <home directory>
    If HomeDir is not given, it will be set to BaseDir/featurename
Method: <the method calculating this feature>
    If Method is not given, an attempts is made to acquire
    the feature from the database. If it fails, ERROR is reported.
Dimensions: <the number of dimensions in this feature>
    If Dimensions is not given, it will be assumed to be 1
    and only the first value for each example will be used
<Further specific configuration of this feature>

feature1:

HomeDir: <home directory>
Method: <the method calculating this feature>
Dimensions: <the number of dimensions in this feature>
<Further specific configuration of this feature>

feature2: … featureN:

If featureN configuration is not given, then all default settings
will apply to this feature.

…

Defined Under Namespace

Classes: SVMFeatureConfig

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Hash

#cc, #to_xy

Constructor Details

#initialize(arg) ⇒ SVMFeaturesConfig 



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# File 'lib/svmlab-config.rb', line 103

def initialize(arg)
  begin
    cfg = YAML.load(arg)
    cfg.each do |k,v|
      self[k] = v
    end
    # Set up dataset file
    if self['DataSet']
      self['DataSet'] = setupDirInfo(self['DataSet'])
      if !File.exists? self['DataSet']
        raise ArgumentError, "Cannot find dataset file #{self['DataSet']}."
      end
    end
    # Get feature methods
    if methods = self['Methods'] 
      if methods.is_a? Array
        methods.each { |method| require setupDirInfo(method) }
      elsif methods.is_a? String
        require setupDirInfo(methods)
      end
    end
    # Set up each feature's configuration
    raise ArgumentError, "Features not given." if !self['Features']
    @dim = 0
    self['Features'].each do |feature|
      self[feature] = SVMFeatureConfig.new(self,feature)
      @dim += self[feature]['Dimensions']
    end
  rescue ArgumentError, LoadError
    raise $!,$!,nil
  end
end

Instance Attribute Details

#cfg ⇒ Object (readonly)

Returns the value of attribute cfg.



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# File 'lib/svmlab-config.rb', line 63

def cfg
  @cfg
end

#dim ⇒ Object (readonly)

Returns the value of attribute dim.



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# File 'lib/svmlab-config.rb', line 63

def dim
  @dim
end

Instance Method Details

#setupDirInfo(path) ⇒ Object 



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# File 'lib/svmlab-config.rb', line 136

def setupDirInfo(path)
  if path !~ /^\// 
    base = self['BaseDir']
    raise ArgumentError, "BaseDir not given." if !base
    path.sub!(/#{path}/, base + '/' + path)
    path.sub!(/\/\//,'/')
  end
  path 
end