输出结果：array([5, 7, 9])int_arr[::2]#通过调整步长，你可以轻松地获取到数组中的特定元素序列。#every other element输出结果：array([0, 2, 4, 6, 8])int_arr[::2]#the entire array in reverse order输出结果：array([9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
# Importing the NumPy library and aliasing it as 'np'importnumpyasnp# Importing the sys moduleimportsys# Creating a NumPy array 'nums' containing integers from 0 to 1999 using np.arange()nums=np.arange(2000)# Setting the print options to display the entire array without truncation# 'threshol...
importnumpyasnp# 创建一个三维数组array_3d=np.array([[[1,2],[3,4]],[[5,6],[7,8]]])# 计算数组的总和sum_3d=np.sum(array_3d)print("Sum of entire array:",sum_3d) Python Copy Output: 示例代码 6:三维数组按第一个轴求和 importnumpyasnp# 创建一个三维数组array_3d=np.array([[[1...
# find the range of entire arrayrange1 = np.ptp(array1)# find the range across axis 0range2 = np.ptp(array1,0)# find the range across axis 0 and 1range3 = np.ptp(array1, (0,1)) print('\nRange of the entire array:', range1)print('\nRange across axis 0:\n', range2)p...
print('Max of entire array:', result1)print('Max of only odd elements:', result2)print('Max of numbers less than 30:', result3) Run Code Output Max of entire array: 50 Max of only odd elements: 47 Max of numbers less than 30: 25...
个非全零数组non_zero_array=np.array([[0,0,0],[0,1,0],[0,0,0]])print("Is non_zero_array all zeros?",check_all_zeros_any(non_zero_array))# 使用字符串创建数组str_array=np.array(['numpyarray.com','0','0'])print("Is str_array all zeros?",check_all_zeros_any(str_array)...
array([ 0 2 4 6 8 10 12 14 16 18]) 这次我们做对了!加法、减法、除法以及很多其他运算也是同样的。 而且,每个NumPy数组都具有以下属性: ndim:维数。 shape:每一维的大小。 size:数组中元素的总数。 dtype:数组的数据类型(例如int、float、string等)。
NumPy operatons perform(执行) complex computations on entire arrays without the need of Python for loops.(面向数组编程,不需要写循环) To give you an idea of the performance differnce(性能差异), consider(演示) a NumPy array one million integers, and the equivalent Python list: ...
arr = np.array([1,2,3,4,5,6,7]) print(arr[1:5:2]) Try it Yourself » Example Return every other element from the entire array: importnumpyasnp arr = np.array([1,2,3,4,5,6,7]) print(arr[::2]) Try it Yourself » ...
nddary, an efficient multidimensional array providing fast array-oriented(面向数组编程) arithmetic operations and flexible broadcasting capabilitles.(强大而灵活的广播机制) Mathematical functions for fast operations on entire arrays of data without having to write loops.(高效的数学函数, 面向数组编程而不用...