linspace(start, end, num): 如linspace(0,1,11)结果为[0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1]; arange(n): 产生一个从0到n-1的向量,如arange(4)结果为[0,1,2,3] random.random([...]): 产生随机矩阵,如random.random([2,3])产生一个2x3维的随机数 x, y = np.random.rand(2, ...