# Linear algebra module for matrix operation etc.
#
# First written by k-fleak
#   Time-stamp: <05/10/08>


module LinearAlgebra
  
  def defZeroMatrix(row, col)
    (0...row).collect {Array.new(col).fill(0)}
  end
  
  def multiply(mat1, mat2)
    mat = defZeroMatrix(mat1.size, mat2[0].size)
    mat1.size.times do |i|
      mat2[0].size.times do |j|
        mat1[0].size.times do |k|
          mat[i][j] += mat1[i][k]*mat2[k][j]
        end
      end
    end
    mat
  end
  
end