method

column

v1_9_3_392 - Show latest stable - 0 notes - Class: Matrix

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1_9_3_392 (0)
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column(j) public

Returns column vector number j of the matrix as a Vector (starting at 0 like an array). When a block is given, the elements of that vector are iterated.

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# File lib/matrix.rb, line 356
  def column(j) # :yield: e
    if block_given?
      return self if j >= column_size || j < -column_size
      row_size.times do |i|
        yield @rows[i][j]
      end
      self
    else
      return nil if j >= column_size || j < -column_size
      col = Array.new(row_size) {|i|
        @rows[i][j]
      }
      Vector.elements(col, false)
    end
  end

column

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