MATLAB --- sum function usage
1/sum of elements.S = sum (x) is the sum of the elements of the vector X. IfX is a matrix, S is a row vector with the sum over eachColumn. For N-D arrays, sum (x) operates along the firstNon-singleton dimension.If X is
When writing to half of the code, you need to count the product of the specified line. Think of a SQLNew function for EXP (SUM (field)) try. The full code is as follows-- ============================================= --Author: --Create Date:
For an array with n elements, a[0]~a[n-1], the maximum value of the subarray is obtained.For example: array a[] = [−2, 1,−3, 4,−1, 2, 1,−5, 4], then successive subsequence [4,−1,2,1] has the largest and 6.Method One: ViolenceLoop traversal, output
This article mainly introduces the method of calculating the sum and product of the values in the PHP array, and analyzes the function and use of the array_sum and array_product functions in detail in the case form, and a friend can refer to the
There are two arrays A and B, all of which are N in size. The values of the array elements are unordered due to arbitrary integer numbers;Requirement: by exchanging elements in A and B, the difference between the sum of Elements A and B is minimized.
The sum of the maximal sub-arrays is calculated by the ring array:Experimental requirements:Randomly produces an array of shapes, assuming that the end-to-end is connected to a ring, the sum of the concatenated word groups is obtained, and the
Shell script sum (Code instance), shell script sum instance
The principle is as follows:
1) define two variables I, sum, both initialized to 0 2) define a loop body, calculate the sum. 3) Use let $ sum = $ sum + $ I to replace the value. 3) sum of
[Sword refers to Offer learning] [interview question 31: the largest sum of consecutive sub-arrays], sword refers to offerQuestion: enter an integer array with a positive or negative number in the array. One or more consecutive integers in the array
With the launch of a variety of Mobile Phone Products and the investment of tens of millions of dollars in Jinsha River venture capital, dim sum OS has been widely known to the industry and consumers. I believe many people know that the snack
Given an array of n positive integers and a positive integer s, find the minimal length of a subarray of which the Sum≥s . If there isn ' t one, return 0 instead.For example, given the array [2,3,1,2,4,3] and s = 7 ,The subarray has the [4,3]
I think the writing is very clear, I hope there is no infringement of the author's copyright, the original address http://blog.csdn.net/hackbuteer1/article/details/6699642To quickly find the two numbers in an array so that the sum of the two numbers
Sum sum sumTime limit:2000/1000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 290 Accepted Submission (s): 194Problem Descriptionwe call a positive numberXP-number If there is isn't a positive number that's less
Problem 1 [Balanced Binary Tree]Given a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree was defined as a binary tree in which the depth of the Every node never differ by more than 1.Problem 2 [Path Sum]
The IP/ICMP/IGMP/TCP/UDP protocol has the same checksum algorithm. The algorithm is as follows:
When sending data, in order to calculate the number of IP reported checksum. Follow these steps:(1) set the IP datagram header to 0, including the
In the fable of Lagan Dan, this is about the game between the fox and the wolf.
One night, the fox walked up to the well and leaned down to see the shadow of the moon on the bottom of the well. it thought it was a big cheese. The hungry fox
The algorithm of three version below is essentially the same, namely, Kadane ' s algorithm, which are of O (n) complexity. Https://en.wikipedia.org/wiki/Maximum_subarray_problemThe evolution of the implementations is to remove redundancy and does
ACdream: Sum, acdreamsum
SumTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 128000/64000 KB (Java/Others) SubmitStatisticNext ProblemProblem Description
You are given an N * N digit matrix and you can get several horizontal or vertical digit
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such this adding up all the values along the Path equals the given sum.For Example:Given The below binary tree andsum = 22, 5 / 4 8
Given an array with n integers, you need to find if there is triplets (I, J, K) which satisfies following conditions:
0
Sum of Subarrays (0, i-1), (i + 1, j-1), (j + 1, k-1) and (k + 1, n-1) should be equal.
Where we define that
Most of the data in MATLAB is handled in matrix form and the SUM function is sum
Here are a few examples to illustrate the application of the summation function:
In MATLAB: A=sum (a)% column sumB=sum (a,2)% row sumC=sum (A (:))% matrix summation
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