Numpy size()函数| Python
原文:https://www.geeksforgeeks.org/numpy-size-function-python/
在 Python 中，numpy.size()函数计算沿给定轴的元素数量。
语法: numpy.size(arr，axis=None) 参数: arr:【array _ like】输入数据。 轴:【int，可选】计算元素(行或列)的轴(x，y，z)。默认情况下，给出数组中元素的总数 返回:【int】返回沿给定轴的元素数。
代码#1 :
蟒蛇 3
# Python program explaining
# numpy.size() method
# importing numpy
import numpy as np
# Making a random array
arr = np.array([[1, 2, 3, 4], [5, 6, 7, 8]])
# By default, give the total number of elements.
print(np.size(arr))
Output:
8
代码#2 :
蟒蛇 3
# Python program explaining
# numpy.size() method
# importing numpy
import numpy as np
# Making a random array
arr = np.array([[1, 2, 3, 4], [5, 6, 7, 8]])
# count the number of elements along the axis.
# Here rows and columns are being treated
# as elements
#gives no. of rows along x-axis
print(np.size(arr, 0))
#gives no. of columns along y-axis
print(np.size(arr, 1))
Output:
2
4
