编写一个 Python 程序,以降序对 Numpy 数组项进行排序。首先,Numpy 排序函数(orarr.sort())按升序对数组项进行排序。接下来,我们使用负值对数组进行切片,以反转数组(descarr = orarr[:-1]),这变成降序。
# Sort Array Descending
import numpy as np
orarr = np.array([22, 98, 77, 88, 35, 15, 122, 91])
print("***Sorting Numpy Array in Descending Order***")
print("Original Array = ", orarr)
orarr.sort()
descarr = orarr[::-1]
print("Array in Descending Order = ", descarr)
按降序排列 Python Numpy 数组项目输出
***Sorting Numpy Array in Descending Order***
Original Array = [ 22 98 77 88 35 15 122 91]
Array in Descending Order = [122 98 91 88 77 35 22 15]
使用 For 循环对数组进行降序排序的 Python 程序。
在这个 Python 示例中,我们使用嵌套循环范围来按降序对 numpy 数组项进行排序。在循环中,if 语句(if(dear[I]< dearr[j])) checks each item is less than other 数组项并将它们赋给 temp 变量。
# Sort Array Descending
import numpy as np
dearr = np.array([11, 46, 22, 89, 77, 98, 55, 181, 65])
print("***Sorting Numpy Array in Descending Order***")
print("Original Array = ", dearr)
length = len(dearr)
for i in range(length):
for j in range(i + 1, length):
if (dearr[i] < dearr[j]):
temp = dearr[i]
dearr[i] = dearr[j]
dearr[j] = temp
print("Array in Descending Order = ", dearr)
使用 for 循环输出按降序对 Python Numpy 数组项进行排序
***Sorting Numpy Array in Descending Order***
Original Array = [ 11 46 22 89 77 98 55 181 65]
Array in Descending Order = [181 98 89 77 65 55 46 22 11]
在这个 Python Numpy Array 示例中,我们创建了一个函数(arrayDescending(dearr)),它按照降序对数组元素进行排序。
# Sort Array Descending
import numpy as np
def arrayDescending(dearr):
for i in range(len(dearr)):
for j in range(i + 1, len(dearr)):
if (dearr[i] < dearr[j]):
temp = dearr[i]
dearr[i] = dearr[j]
dearr[j] = temp
dearr = np.array([64, 36, 77, 55, 88, 95, 44, 91, 21])
print("***Sorting Numpy Array in Descending Order***")
print("Original Array = ", dearr)
arrayDescending(dearr)
print("Array in Descending Order = ", dearr)