method

vstack

v2_4_6 - Show latest stable - 0 notes - Class: Matrix

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vstack(x, *matrices) public

Create a matrix by stacking matrices vertically

x = Matrix[[1, 2], [3, 4]]
y = Matrix[[5, 6], [7, 8]]
Matrix.vstack(x, y) # => Matrix[[1, 2], [3, 4], [5, 6], [7, 8]]

Show source

# File lib/matrix.rb, line 315
  def Matrix.vstack(x, *matrices)
    raise TypeError, "Expected a Matrix, got a #{x.class}" unless x.is_a?(Matrix)
    result = x.send(:rows).map(&:dup)
    matrices.each do |m|
      raise TypeError, "Expected a Matrix, got a #{m.class}" unless m.is_a?(Matrix)
      if m.column_count != x.column_count
        raise ErrDimensionMismatch, "The given matrices must have #{x.column_count} columns, but one has #{m.column_count}"
      end
      result.concat(m.send(:rows))
    end
    new result, x.column_count
  end

vstack

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