Class: OpenTox::Algorithm::Transform::Inverter

Inherits:
Object
  • Object
show all
Defined in:
lib/algorithm.rb

Overview

The transformer that inverts values. 1/x is used, after values have been moved >= 1.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Inverter

@params Values to transform. @params Offset for restore.



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# File 'lib/algorithm.rb', line 723

def initialize *args
  case args.size
  when 1
    begin
      values=args[0]
      raise "Cannot transform, values empty." if @values.size==0
      @values = values.collect { |v| -1.0 * v }  
      @offset = 1.0 - @values.minmax[0] 
      @offset = -1.0 * @offset if @offset>0.0 
      @values.collect! { |v| v - @offset }   # slide >1
      @values.collect! { |v| 1 / v }         # invert to [0,1]
    rescue Exception => e
      LOGGER.debug "#{e.class}: #{e.message}"
      LOGGER.debug "Backtrace:\n\t#{e.backtrace.join("\n\t")}"
    end
  when 2
    @offset = args[1].to_f
    @values = args[0].collect { |v| 1 / v }
    @values.collect! { |v| v + @offset }
    @values.collect! { |v| -1.0 * v }
  end
end

Instance Attribute Details

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/algorithm.rb', line 719

def offset
  @offset
end

#values ⇒ Object

Returns the value of attribute values.



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# File 'lib/algorithm.rb', line 719

def values
  @values
end