Class: CAClassIterator

Inherits:
CAIterator show all
Defined in:
lib/carray/base/iterator.rb

Overview

:nodoc:

Constant Summary collapse

UNIFORM_KERNEL = 
false

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from CAIterator

#[], #[]=, #asign!, #ca, #convert, define_calculate_method, define_evaluate_method, define_filter_method, #each, #each_with_addr, #each_with_index, #inject, #pick, #put, #sort_by, #sort_by!, #sort_with, #to_a

Constructor Details

#initialize(reference, classifier = nil) ⇒ CAClassIterator 



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# File 'lib/carray/base/iterator.rb', line 316

def initialize (reference, classifier = nil)
  @reference = reference
  @classifier = classifier || @reference.uniq.sort
  @null = CArray.new(@reference.data_type,[0])
  @table = {}
  @rank = 1
  @dim  = [0]
  if @classifier.all_masked? or @classifier.size == 0
    @dim  = [0]
  else
#      @dim  = [@classifier.max+1]
    @dim  = [@classifier.size]
  end
end

Instance Attribute Details

#classifier ⇒ Object (readonly)

Returns the value of attribute classifier.



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# File 'lib/carray/base/iterator.rb', line 331

def classifier
  @classifier
end

#table ⇒ Object (readonly)

Returns the value of attribute table.



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# File 'lib/carray/base/iterator.rb', line 331

def table
  @table
end

Instance Method Details

#__build__(&block) ⇒ Object 



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# File 'lib/carray/base/iterator.rb', line 333

def __build__ (&block)
  if @block
    @classifier.each_with_addr do |v, i|
      @table[v] = block[v].where
    end
  else
    @classifier.each_with_addr do |v, i|
      @table[v] = @reference.eq(v).where
    end
  end
  return self
end

#kernel_at_addr(addr, ref = nil) ⇒ Object 



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# File 'lib/carray/base/iterator.rb', line 353

def kernel_at_addr (addr, ref = nil)
  ref ||= @reference
  if @table[addr]
    return ref[@table[addr]]
  else
    return @null
  end
end

#kernel_at_index(idx, ref = nil) ⇒ Object 



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# File 'lib/carray/base/iterator.rb', line 362

def kernel_at_index (idx, ref = nil)
  kernel_at_addr(idx[0], ref)
end

#ranking(&block) ⇒ Object 



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# File 'lib/carray/base/iterator.rb', line 346

def ranking (&block)
  block ||= lambda {|a| a.size }
  values = self.to_a.map{|v| block[v] }.to_ca
  addrs  = values.sort_addr.reverse
  return CArray.join([@classifier[addrs], values[addrs]])
end