numpy.round_(arr, decimals = 0, out = None)：此数学函数将数组四舍五入为给定的小数位数。
参数：
-
array : [数组]输入数组。
decimal : [int，可选]我们要舍入的小数位。 - out : [可选的]输出结果数组
默认值=0。如果是-ve十进制，则指定n0。小数点左边的位置。
返回：
An array with all array elements being rounded off, having same type as input.
代码1：工作
# Python program explaining
# round_() function
import numpy as np
in_array = [.5, 1.5, 2.5, 3.5, 4.5, 10.1]
print ("Input array : \n", in_array)
round_off_values = np.round_(in_array)
print ("\nRounded values : \n", round_off_values)
in_array = [.53, 1.54, .71]
print ("\nInput array : \n", in_array)
round_off_values = np.round_(in_array)
print ("\nRounded values : \n", round_off_values)
in_array = [.5538, 1.33354, .71445]
print ("\nInput array : \n", in_array)
round_off_values = np.round_(in_array, decimals = 3)
print ("\nRounded values : \n", round_off_values)输出：
Input array : [0.5, 1.5, 2.5, 3.5, 4.5, 10.1] Rounded values : [ 0. 2. 2. 4. 4. 10.] Input array : [0.53, 1.54, 0.71] Rounded values : [ 1. 2. 1.] Input array : [0.5538, 1.33354, 0.71445] Rounded values : [ 0.554 1.334 0.714]
代码2：工作
# Python program explaining
# round_() function
import numpy as np
in_array = [1, 4, 7, 9, 12]
print ("Input array : \n", in_array)
round_off_values = np.round_(in_array)
print ("\nRounded values : \n", round_off_values)
in_array = [133, 344, 437, 449, 12]
print ("\nInput array : \n", in_array)
round_off_values = np.round_(in_array, decimals = -2)
print ("\nRounded values upto 2: \n", round_off_values)
in_array = [133, 344, 437, 449, 12]
print ("\nInput array : \n", in_array)
round_off_values = np.round_(in_array, decimals = -3)
print ("\nRounded values upto 3: \n", round_off_values)输出：
Input array : [1, 4, 7, 9, 12] Rounded values : [ 1 4 7 9 12] Input array : [133, 344, 437, 449, 12] Rounded values upto 2: [100 300 400 400 0] Input array : [133, 344, 437, 449, 12] Rounded values upto 3: [0 0 0 0 0]
参考文献： https://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.round_.html#numpy.round_
。
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注：本文由纯净天空筛选整理自Mohit Gupta_OMG 大神的英文原创作品 numpy.round_() in Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。