quantopian algorithms

/************************************************************************************************************** File Description: "1" internal sort: refers to in the sort period of the elements are stored in memory of the sort "2" external sort: refers to in the sort of the elements can not be stored in memory at the same time, must be in the process of ordering, as required, constantly moving between the inside and outside the The stability of the sort "3" Sorting algorithm

Overview of recommended algorithms (i)It is very important to choose the correct recommendation algorithm for the recommender system, and there are many algorithms available, and it is very difficult to find the algorithm that best suits the problem you are dealing with. Each of these algorithms has its own merits and limitations, so we should measure it before m

What is an algorithm?In short, any well-defined calculation step can be called an algorithm that accepts one or a set of values as input and outputs one or a set of values. (Source: Homas H. Cormen, Chales E. Leiserson, 3rd edition of the algorithmic introduction)It can be understood that the algorithm is a series of steps to solve a particular problem (not only the computer needs the algorithm, we also use the algorithm in our daily life). The algorithm must have the following 3 important featu

In today's world, there are countless classical algorithms that have been discovered or created. If you must vote for the top ten algorithms that you value most, what would you choose? Recently, someone in the Stackexchange launched a question, to the netizens to collect the world's most classic ten algorithms. The crowd voted in a pile of shortlisted

In today's world, there are countless classic algorithms that have been discovered or created. If you must vote for the top ten algorithms that you value most, what would you choose? Recently, someone in the Stackexchange launched a question, to the netizens to collect the world's most classic ten algorithms. The crowd voted in a whole bunch of shortlisted

Continue with the original algorithm to continue the explanation: (5) Bayesian method Bayesian algorithm is a kind of algorithm based on Bayesian theorem, which is mainly used to solve the problem of classification and regression. Common algorithms include: naive Bayesian algorithm, average single-dependency estimation (averaged one-dependence estimators, Aode), and Bayesian belief Network (BBN). (6) kernel-based

The international authoritative academic organization theieeeinternationalconferenceondatamining (ICDM) selected ten classical algorithms in the field of data mining in December 2006: C4.5,k-means,svm,apriori,em , Pagerank,adaboost,knn,naivebayes,andcart.Not only the top ten algorithms selected, in fact, participate in the selection of the 18 algorithms, in fact,

are described in section 2.2.(2) evaluation Functions (Evaluation function)Evaluation function is a criterion to evaluate the quality of a subset of features. The evaluation function will be introduced in section 2.3.(3) stop criteria (stopping Criterion)The stop criterion is related to the evaluation function and is generally a threshold that stops the search when the value of the evaluation function reaches this threshold.(4) verification Process (Validation Procedure)Validates the validity o

0 reply: 1. Python Data Structure For more information about Data Structures, see [Problem Solving with Python] (Welcome to Problem Solving with Algorithms and Data Structures ) [The link to this website may be slow]. Of course, it also integrates some [Introduction to Algorithms] (Introduction to Algorithms In addition, there are a lot of content on wikipedia,

Today, genetic algorithms, genetic algorithms have many applications, such as pathfinding, eight digital problems, prisoner dilemma, motion control, TSP problem, productionscheduling problem, in a polygon to find a circle contained within the polygon, the function to find the most value problem, and so on. Previously, the simulated annealing algorithm was usedTo solve the optimization problem, the link is:

Divide and conquer algorithmFirst, the basic conceptIn computer science, divide-and-conquer method is a very important algorithm. The literal explanation is "divide and conquer", which is to divide a complex problem into two or more identical or similar sub-problems, then divide the problem into smaller sub-problems ... Until the last sub-problem can be solved simply, the solution of the original problem is the merger of the solution of the sub-problem. This technique is the basis for many effic

C+11 added a number of convenient algorithms, these new algorithms make our code more concise and convenient to write, here just to enumerate some of the commonly used new algorithms, as a summary, more new algorithms readers can refer to http://en.cppreference.com/w/cpp/algorithm.The algorithm library has three new

The author of 16 began to focus on block chain technology, block chain of typical representatives, is also the most familiar is the bitcoin, bitcoin from the beginning no one knew the hot world, China's national mining, the ZF ban trading, to now abroad or wind, bitcoin from the beginning of trading to now should be the longest-growing "futures" bar, Many programmers feel that they missed out on a chance to become a billionaire. Bitcoin and block chain related documents can refer to: "C%23 block

From: InfoQ (No.: Infoqchina) Links: http://www.infoq.com/cn/news/2012/08/32-most-important-algorithms Dr. Christoph Koutschan, of the Austrian Institute for Symbolic Computing (research Institute for symbolic computation, or RISC), published an article on his own page, mentioning that he did a survey, Most of the participants were computer scientists, and he asked the scientists to vote for the most important

1IntroductionWeibo is a social app that many people use. Every day the people who brush micro-Bo will carry out such a few operations daily: original, forward, reply, reading, attention, @ and so on. Among them, the first four are for short blog posts, the final attention and @ is for the relationship between users, attention to someone means that you become his fans, and he became your friend; @ someone means you want him to see your Weibo message.Weibo is thought to be "self-media", the way th

This article is http://blog.csdn.net/xiazdong/article/details/7304239 Supplement, looked at the "Big Talk Data Structure" summary, but now read the "Introduction to the algorithm", found that the previous understanding of the sequencing is not deep, So I'm going to go over all sorts of ideas again. This paper first introduces the sorting algorithm based on the comparison model, that is, the worst complexity is in the Ω (NLGN) sorting algorithm, and then introduces some linear time sorting

Basic Sorting Algorithm Overview reference Mu-net Liuyubobobo teacher "algorithm and data Structure" course and corresponding GitHub code warehouse Liuyubobobo teacher "visible algorithm" course and the corresponding GitHub code warehouse Content SummaryIn this section, we only introduce two basic sorting algorithms, before I go to find work, learning algorithms only know the two sorting