swix是Swift的矩阵库。示例代码：
ones(4) == [1, 1, 1, 1]ones((4,4)) == matrix([1, 1], [1, 1])// same with zerosarray(1, 2, 3, 4) == [1, 2, 3, 4]array("[1 2; 4 5]") == matrix([1 2], [4 5])ones(4) * 4 == [4, 4, 4, 4]ones(4) * (zeros(4) + 2) == [2, 2, 2, 2]// same for +, -, *, /
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