method

empty

v2_1_10 - Show latest stable - 0 notes - Class: Matrix

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What's this?

empty(row_count = 0, column_count = 0) public

Creates a empty matrix of row_count x column_count. At least one of row_count or column_count must be 0.

m = Matrix.empty(2, 0)
m == Matrix[ [], [] ]
  => true
n = Matrix.empty(0, 3)
n == Matrix.columns([ [], [], [] ])
  => true
m * n
  => Matrix[[0, 0, 0], [0, 0, 0]]

Show source

# File lib/matrix.rb, line 287
  def Matrix.empty(row_count = 0, column_count = 0)
    raise ArgumentError, "One size must be 0" if column_count != 0 && row_count != 0
    raise ArgumentError, "Negative size" if column_count < 0 || row_count < 0

    new([[]]*row_count, column_count)
  end

empty

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