method

diagonal?

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

diagonal?() public

Returns true if this is a diagonal matrix. Raises an error if matrix is not square.

# File lib/matrix.rb, line 674
  def diagonal?
    Matrix.Raise ErrDimensionMismatch unless square?
    each(:off_diagonal).all?(&:zero?)
  end