Jan 16, 2016 · A very small change in your code is to use slicing and perform the sums of the sub-arrays using the sum() method: def sub_sums(arr, l, m): result = np.zeros((len(arr) // l, len(arr[0]) // m)) rows = len(arr) // l * l cols = len(arr[0]) // m * m for i in range(len(arr) // l): for j in range(len(arr[0]) // m): result[i, j] = arr[i*m:(i+1)*m, j*l ...

Jul 27, 2023 · Find the sum of a Sublist using Slice notation. This problem can be solved using Python’s slice notation. This method allows you to extract a portion of the list between the start and end indices, and then use the built-in sum() function to calculate the sum of the sublist.

Nov 26, 2024 · Given an array arr[] and an integer K, the task is to calculate the sum of all subarrays of size K. Examples: Input: arr[] = {1, 2, 3, 4, 5, 6}, K = 3 Output: 6 9 12 15 Explanation: All subarrays of size k and their sum: Subarray 1: {1, 2, 3} = …

May 26, 2011 · weekly = [sum(list(itertools.islice(daily, i, i+7))) for i in range(0, len(daily), 7)] Edit: or, with math.fsum: weekly = [math.fsum(itertools.islice(daily, i, i+7)) for i in range(0, len(daily), 7)]

Jun 13, 2021 · You can use sum function and a comprehension list expression. your_list = [[1,2,3], [4,5,6]] new_list = [sum(l) for l in your_list] print(new_list) Output: [6, 15]

Feb 26, 2024 · Method 1: Using The Built-In sum() and Slicing. Python’s built-in sum() function, coupled with list slicing, is the most straightforward way to calculate the sum of a sublist. Here’s an example: my_list = [1, 2, 3, 4, 5] sublist_sum = sum(my_list[1:4]) # Sum from index 1 to 3 print(sublist_sum) Output: 9

May 8, 2023 · Method #1: Using list comprehension + sum () The list comprehension can be used to perform this particular task to filter out successive groups and the sum function can be used to get the summation of the filtered solution. Time complexity: O (n), …

Jan 31, 2023 · Learn how to find the sum of a sublist in Python with simple examples. Enhance your programming skills and handle lists effectively. Master the technique to find the sum of a sublist in Python with our easy-to-follow tutorial.

Mar 10, 2024 · Problem Formulation: We aim to compute the cumulative sum of all possible contiguous subarrays within a given list of numbers. For instance, given the list [1, 2, 3], the desired output would be the sum of [1], [2], [3], [1, 2], [2, 3], and [1, 2, 3], which equals to 20.

Using sum() with generator expressions this can be shortened to def subarray_sum(a): n = len(a) total = sum(sum(sum(a[i:j + 1]) * a[j] for j in range(i, n)) for i in range(n)) return total