- np,around(a)：
对输入值进行4舍6入的处理，5进行特殊处理。5舍入为本身距离最小的偶数值。例如 np,around[(1.5)]=2,但是np,around[(2.5)]=2同样是正确的。
import numpy as np
print("np.around(1.5):",np.around(1.5))
print("np.around(2.5):",np.around(2.5))
Run:
D:pythonpython.exe C:/Users/ThinkPad/PycharmProjects/pythonProject/HelloWorld.py
np.around(1.5): 2.0
np.around(2.5): 2.0
Process finished with exit code 0
- np.around(a,decimals=b)：
将一个小数4舍6入、5特殊处理到规定小数位数，当b>0时，精确到小数点后b位；当b<0时，精确到小数点前b位
import numpy as np
print("np.around(2.6,decimals=1):",np.around(2.6,decimals=1))
print("np.around(2.6,decimals=-1):",np.around(2.6,decimals=-1))
Run:
D:pythonpython.exe C:/Users/ThinkPad/PycharmProjects/pythonProject/HelloWorld.py
np.around(2.6,decimals=1): 2.6
np.around(2.6,decimals=-1): 0.0
Process finished with exit code 0
- np.floor(a)：
返回不大于输入参数的最大整数，即i<=x
import numpy as np
print("np.floor(2.6):",np.floor(2.6))
Run:
D:pythonpython.exe C:/Users/ThinkPad/PycharmProjects/pythonProject/HelloWorld.py
np.floor(2.6): 2.0
Process finished with exit code 0
- np.ceil(a):
返回不小于输入参数的最大整数，即i>=x
import numpy as np
print("np.ceil(2.6):",np.ceil(2.6))
Run:
D:pythonpython.exe C:/Users/ThinkPad/PycharmProjects/pythonProject/HelloWorld.py
np.ceil(2.6): 3.0
Process finished with exit code 0
