What would be the answer of this cummulative summation in NumPy?
arr = np.array([1,2,3])
print(np.cumsum(arr))

Question

BlackTom AI · Accepted Answer

The question asks about the output of a NumPy cumulative sum operation on the array [1, 2, 3].
Option 1: "[3 6 9]" would correspond to summing in a way that triples each element or accumulates beyond the actual stepwise totals; this is not how cumsum behaves for this input.
Option 2: "[6]" would imply a single total sum rather than a per-element running total, which is not what cumsum returns for a 1D array.
Option 3: "[1 3 6]" aligns with the definition of cumulative sum: the first element is 1, the second element is 1+2 = 3, and the third element is 1+2+3 = 6. When NumPy prints a 1D array, it shows the elements separated by spaces inside brackets, which matches this representation.
Option 4: "6" would be the total sum of the entire array, not a per-position running total; cumsum does not collapse the result to a single value, so this is incorrect for a 1D input.
In short, the only option that mirrors the stepwise accumulation [1, 3, 6] is the third choice, considering how cumulative sums are computed and displayed in NumPy.

What would be the answer of this cummulative summation in NumPy? arr = np.array([1,2,3]) print(np.cumsum(arr))

查看解析

登录即可查看完整答案

类似问题

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单