method

+

Ruby latest stable (v2_5_5) - 0 notes - Class: Matrix

1_8_6_287 (0)
1_8_7_72 (0)
1_8_7_330 (0)
1_9_1_378 (-6)
1_9_2_180 (0)
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10 (0)
2_2_9 (0)
2_4_6 (0)
2_5_5 (0)
2_6_3
What's this?

+(m) public

Matrix addition.

Matrix.scalar(2,5) + Matrix[[1,0], [-4,7]]
  =>  6  0
     -4 12

Show source

# File lib/matrix.rb, line 913
  def +(m)
    case m
    when Numeric
      Matrix.Raise ErrOperationNotDefined, "+", self.class, m.class
    when Vector
      m = self.class.column_vector(m)
    when Matrix
    else
      return apply_through_coercion(m, __method__)
    end

    Matrix.Raise ErrDimensionMismatch unless row_count == m.row_count && column_count == m.column_count

    rows = Array.new(row_count) {|i|
      Array.new(column_count) {|j|
        self[i, j] + m[i, j]
      }
    }
    new_matrix rows, column_count
  end

+

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