method

det

v1_9_3_125 - Show latest stable - 0 notes - Class: LUPDecomposition

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180
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 (0)
What's this?

det() public

Returns the determinant of A, calculated efficiently from the factorization.

# File lib/matrix/lup_decomposition.rb, line 78
    def det
      if (@row_size != @col_size)
        Matrix.Raise Matrix::ErrDimensionMismatch unless square?
      end
      d = @pivot_sign
      @col_size.times do |j|
        d *= @lu[j][j]
      end
      d
    end

det

Related methods