lab for math analysis

1.rb

require 'matrix'

matrix_A = [[3, 2, 1], [-2, 3, -2], [1, -4, 4]]
vector_B = [-1, 1, 6]

p matrix_A
p vector_B

1.upto(matrix_A.size - 1) do |index|
	current_element = matrix_A[index - 1][index - 1]
	p current_element		
	factor = matrix_A[index][index - 1].fdiv(current_element)
	puts matrix_A[index][index - 1]
	puts factor
	p '*' * 50
	index.upto(matrix_A.size - 1) do |i|
		matrix_A[i].map!.with_index { |e, j| e - factor * matrix_A[index - 1][j] }
		vector_B[i] -= factor * matrix_A[index - 1][i]
	end
end

p matrix_A
p vector_B