【python】np.rint() 和 np.ceil() 和 np.linspace()

1、用法：np.rint()是根据四舍五入取整

2、用法：np.ceil()是向上取整，与四舍五入无关

>>import numpy as np
>>n = np.array([-5.6, -4.2, -2.7, 2.7, 4.3, 5.5, 8.1])
>>print(np.ceil(n))
>>print(np.rint(n))

[-5. -4. -2.  3.  5.  6.  9.]
[-6. -4. -3.  3.  4.  6.  8.]

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3、用法：np.linspace(start, stop, num)

     返回：在[start, stop]区间内，选取均匀分布的num个点

​>>x = np.rint(np.linspace(64, 176, 6))
>>y = np.rint(np.linspace(64, 176, 6))
>>z = np.rint(np.linspace(64, 91, 4))
>>print(x)
>>print(y)
>>print(z)​

[  64.   86.  109.  131.  154.  176.]
[  64.   86.  109.  131.  154.  176.]
[ 64.  73.  82.  91.]