column_vectors -> [Vector]
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自分自身を列ベクトルの配列として返します。
require 'matrix' a1 = [ 1, 2, 3] a2 = [10, 15, 20] a3 = [-1, -2, 1.5] m = Matrix[a1, a2, a3] p m.column_vectors # => [Vector[1, 10, -1], Vector[2, 15, -2], Vector[3, 20, 1.5]]