Question

你如何打印一个数组的百分比？

例如：

如果我有

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如何将数组的百分比设置为零？如果我想保持数组的前10％，并将数组的剩余90％更改为零？

提前谢谢你？

Answer 1

这将在前面给你大约90％：

x[0:int(len(x)*0.9)]

后面90％（跳过前10％）：

x[int(len(x)*0.1):]

所以将最后的90％设置为零：

x[int(len(x)*0.1):] = 0

Answer 2

你可以这样做：

import numpy as np

x = np.array([2,3,1,0,4,3,5,4,3,2,3,4,5,10,15,120,102,10])

cut_off = int(0.1*len(x))

print(len(x), cut_off)
for idx in range(cut_off,len(x)):
    x[idx] = 0

Answer 3

x = [2,3,1,0,4,3,5,4,3,2,3,4,5,10,15,120,102,10]
index = 10 * len(x) / 100
x[index:] = [0]*(len(x) - 1 index )
print x
>>> x = [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

Answer 4

以下是我要做的事情：

x = np.array([2,3,1,0,4,3,5,4,3,2,3,4,5,10,15,120,102,10])
change = round(0.9 * len(x)) # changing 90%
x[-change:] = 0 # change from last value towards beginning of array
print(x)

产生

[2 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]

Answer 5

做这个工作吗？

x = np.array([2,3,1,0,4,3,5,4,3,2,3,4,5,10,15,120,102,10])
j=len(x)
k=(j/100)*10
for index in range(k,j):
   x[index]=0

如何在python中显示数组的百分比

5 个答案: