考虑一组数字:
In [8]: import numpy as np
In [9]: x = np.array([np.random.random() for i in range(10)])
In [10]: x
Out[10]:
array([ 0.62594394, 0.03255799, 0.7768568 , 0.03050498, 0.01951657,
0.04767246, 0.68038553, 0.60036203, 0.3617409 , 0.80294355])
现在,我想这组变换成另一组y以下列方式:每个元素i中x,相应的元素j在y将其他元素的数量在x这不到i.例如,上面给出的内容x如下:
In [25]: y
Out[25]: array([ 6., 2., 8., 1., 0., 3., 7., 5., 4., 9.])
现在,我可以使用简单的python循环来做到这一点:
In [16]: for i in range(len(x)):
...: tot = 0
...: for j in …我有一般数据,例如字符串:
np.random.seed(343)
arr = np.sort(np.random.randint(5, size=(10, 10)), axis=1).astype(str)
print (arr)
[['0' '1' '1' '2' '2' '3' '3' '4' '4' '4']
['1' '2' '2' '2' '3' '3' '3' '4' '4' '4']
['0' '2' '2' '2' '2' '3' '3' '4' '4' '4']
['0' '1' '2' '2' '3' '3' '3' '4' '4' '4']
['0' '1' '1' '1' '2' '2' '2' '2' '4' '4']
['0' '0' '1' '1' '2' '3' '3' '3' '4' '4']
['0' '0' '2' '2' '2' '2' '2' '2' '3' '4'] …