【NumPy】 之常见运算(np.around、np.floor、np.ceil、np.where)(转)
原博客链接:https://blog.csdn.net/tz_zs/article/details/80775256
np.around:
四舍五入取整
n = np.array([-0.746, 4.6, 9.4, 7.447, 10.455, 11.555])
around1 = np.around(n)
print(around1) # [ -1. 5. 9. 7. 10. 12.]
np.floor:
向下取整
n = np.array([-1.7, -2.5, -0.2, 0.6, 1.2, 2.7, 11])
floor = np.floor(n)
print(floor) # [ -2. -3. -1. 0. 1. 2. 11.]
np.ceil:
向上取整
n = np.array([-1.7, -2.5, -0.2, 0.6, 1.2, 2.7, 11])
ceil = np.ceil(n)
print(ceil) # [ -1. -2. -0. 1. 2. 3. 11.]
np.where:
相当于三元运算符,
data = [[ 0.93122679 0.82384876 0.28730977]
[ 0.43006042 0.73168913 0.02775572]]
result = np.where(data > 0.5, data, 0)
print(result)
'''
[[ 0.93122679 0.82384876 0. ]
[ 0. 0.73168913 0. ]]
'''