Python中的 numpy.add()
当我们想要计算两个数组的加法时,使用numpy.add()
函数。它按元素添加参数。如果两个数组的形状不相同,即arr1.shape != arr2.shape
,它们必须可以广播到一个共同的形状(可能是一个或另一个的形状)。
Syntax : numpy.add(arr1, arr2, /, out=None, *, where=True, casting=’same_kind’, order=’K’, dtype=None, subok=True[, signature, extobj], ufunc ‘add’)
Parameters :
arr1 : [array_like or scalar] Input array.
arr2 : [array_like or scalar] Input array.
out : [ndarray, optional] A location into which the result is stored.
-> If provided, it must have a shape that the inputs broadcast to.
-> If not provided or None, a freshly-allocated array is returned.
where : [array_like, optional] Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone.
**kwargs :Allows to pass keyword variable length of argument to a function. Used when we want to handle named argument in a function.
Return : [ndarray or scalar] The sum of arr1 and arr2, element-wise. Returns a scalar if both arr1 and arr2 are scalars.
代码#1:工作
# Python program explaining
# numpy.add() function
# when inputs are scalar
import numpy as geek
in_num1 = 10
in_num2 = 15
print ("1st Input number : ", in_num1)
print ("2nd Input number : ", in_num2)
out_num = geek.add(in_num1, in_num2)
print ("output number after addition : ", out_num)
输出 :
1st Input number : 10
2nd Input number : 15
output number after addition : 25
代码#2:
# Python program explaining
# numpy.add() function
# when inputs are array
import numpy as geek
in_arr1 = geek.array([[2, -7, 5], [-6, 2, 0]])
in_arr2 = geek.array([[5, 8, -5], [3, 6, 9]])
print ("1st Input array : ", in_arr1)
print ("2nd Input array : ", in_arr2)
out_arr = geek.add(in_arr1, in_arr2)
print ("output added array : ", out_arr)
输出 :
1st Input array : [[ 2 -7 5]
[-6 2 0]]
2nd Input array : [[ 5 8 -5]
[ 3 6 9]]
output added array : [[ 7 1 0]
[-3 8 9]]