[英]How to subtract neighbouring vectors in a numpy array from each other
My expected results are as follows: 我的预期结果如下:
array = [[2,3,4], [1,2,4]]
Output: 输出:
[1, 1, 0] # [2-1, 3-2, 4-4]
I tried doing this by enumerating and getting the indexes to subtract with no luck as: 我尝试通过枚举并让索引减去没有运气的方式来这样做:
for i, k in enumerate(array):
for j in k:
return(j[i+1] - j[i])
Which gives me: 这给了我:
IndexError: invalid index to scalar variable.
IndexError:标量变量的索引无效。
This works: 这有效:
result = [(i-j) for (i,j) in zip(*array)]
Output: 输出:
print (result)
[1, 1, 0]
Explanation: 说明:
zip(*array)
is equivalent to the list of tuples [(2,1), (3,2), (4,4)]
zip(*array)
等效于元组列表[(2,1), (3,2), (4,4)]
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