Class: VectorComparer

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

Class Method Summary collapse

Class Method Details

.compare_vectors ⇒ Object 



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# File 'lib/vector_comparer.rb', line 23

def self.compare_vectors
	puts "How many test vectors should there be?"
	@number_of_test_vectors = gets.chomp.to_i
	puts "What should the threshold be?"
	@threshold = gets.chomp.to_i

	#Generate 10, 128-d random vectors
	random_vectors = Array.new(@number_of_random_vectors)
	@number_of_random_vectors.times do |i|
		random_vector = Array.new(@dimensions)
		@dimensions.times do |n|
			random_vector[n] = random1 
		end
		random_vectors[i] = random_vector
	end

	#Generate x, 128-d test vectors
	test_vectors = Array.new(@number_of_test_vectors)
	@number_of_test_vectors.times do |i|
		test_vector = Array.new(@dimensions)
		@dimensions.times do |n|
			test_vector[n] = random1 
		end
		test_vectors[i] = test_vector
	end		

	puts "For threshold #{@threshold}..."
	test_vectors.each do |test_vector|
		number_near_orthogonal = 0
		random_vectors.each do |random_vector|
			dp = dot_prod(test_vector,random_vector)
			if dp.abs < @threshold 
				number_near_orthogonal += 1
			end
		end
		puts "The random test vector was nearly orthogonal to #{number_near_orthogonal} or the initial vectors"
	end
end

.dot_prod(v1, v2) ⇒ Object 



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# File 'lib/vector_comparer.rb', line 15

def self.dot_prod(v1,v2)
	product = 0
	v1.length.times do |i|
		product += v1[i] * v2[i]
	end
	return product
end

.random1 ⇒ Object 



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# File 'lib/vector_comparer.rb', line 6

def self.random1
	number = rand(2)
	if number == 0 
		return -1
	else
		return 1
	end
end