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21 of Apache Spark Source code reading-about Linear Regression Algorithm Implementation in mllib

You are welcome to reprint it. Please indicate the source, huichiro.Summary This article briefly describes the implementation of the linear regression algorithm in Spark mllib, involves the theoretical basis of the linear regression algorithm itself and linear regression parallel processing, and then reads the code imp

Eight sorting algorithm source code + time-consuming comparison (see good things turn down)

(J >= 0 a[first-1 + j] > t){A[first-1 + j + d] = a[first-1 + j];J-= D;}A[first-1 + j + d] = t;}}} /* Heap Sort */Template void Heapsort (T a[], int first, int last){int num = Last-first + 1;int F, C;T T;for (f = num/2; f >= 1;--f){c = f * 2;t = a[first-1 + f];while (c {if (c + 1 ++c;if (T > a[first-1 + c])BreakA[first-1 + C/2] = a[first-1 + c];C *= 2;}A[first-1 + C/2] = t;} while (num > 1){Swap (A[first], A[first + num-1]);c = 2;t = A[first]; while (c {if (c + 1 ++c;if (a[first-1 + C] BreakA[f

[Source code] C # implementation of GIS point and line buffer generation algorithm (V0.95)

Today, the source code is pasted on. Please give me more criticism. I hope you can point out some mistakes. Thank you. In the future, I will take the time to learn how to deal with special cases and add them. I hope you will have more support. Source code structure: Source

Rabin-karp algorithm in the Go Language source code

The Strings.go package implements a Rabin-karp algorithm. A bit of a meaning.About this algorithm:Turing community has an article: illustrated Rabin-karp string Lookup algorithmAbout Go Source implementation:Netizen Golove has written a very detailed explanation. Http://www.cnblogs.com/golove/p/3234673.htmlGolove that has been analyzed very clearly, but the preceding string of instructions is too long. I re

Grid geodesic algorithm (geodesics in Heat) attached source code

); Ones (NSRC,1)]; %Hard constrained R= Setdiff ([1: NV], NB); UD=[A (R,:); Acons]\[b (R,:); Bcons]; %1.2Neumann condition Acons= Sparse ([1: Nsrc], SRC, ones (1, NSRC), NSRC, NV); Bcons= Ones (NSRC,1); %Hard constrained R= Setdiff ([1: NV], SRC); UN=[A (R,:); Acons]\[b (R,:); Bcons]; %averaged boundary condition U=0.5* (UN +UD); Percent Step2: Evaluate the vector field X G= Grad (V, F); % nf*3by NV Matrix (gradient operator-all triangular vertex base functions) Grad_u= Reshape (g*u, s

Typical Example of php recursive algorithm-PHP source code

: 1) s (n) = s (n-1) + n2) s (1) = 1So the source code is: int progression(int n){ int res; if (n=1 )res=1 else res=progression(n-1)+n; return res; } Traversing a binary tree in ascending order void inorder (BinTree T){ if (T){ inorder(T->lchild); printf(“%c”,T->data); inorder(T->rchild); } } Mysql First, we prepare a data table class to record the product category information. The tab

An example of RSA asymmetric encryption algorithm using OpenSSL

This article mainly introduces the use of OpenSSL to implement RSA asymmetric encryption algorithm example, we refer to the use of the bar nbsp; Code as follows: ; nbsp; nbsp; need to be aware that Apache supports OpenSSL nbsp;

(Conversion) implementation of the Three-hill sorting of the Classical Vernacular algorithm series (with source code implementation)

more people understand the image, I add the following figures: Http://hi.baidu.com/gsgaoshuang/item/17a8ed3c24d9b1ba134b14c2 Assume that the length of the array is 10, and the array elements are: 25, 19, 6, 58, and. The process of the entire hill sorting algorithm is as follows: Is the raw data and the incremental D selected for the first time = 5. The result of this sorting is as follows: This is the result of the first sorting. the incremental

Source code analysis of WEKA algorithm Classifier-tree-J48 (3) modelselection

(m_attIndex),instance); } m_distribution = newDistribution; // For all values for (i = 0; i As you can see, the previous Code builds a new secondedistribution based on the existing distribution based on different values of this attribute, secondDistribution = new Distribution(newDistribution,i);This distribution contains two columns with The subscripts I and the rest. Based on this distribution, information gain and information gain rate a

Source code analysis of Weka algorithm Classifier-tree-J48 (3) ModelSelection

Source code analysis of Weka algorithm Classifier-tree-J48 (3) ModelSelection ModelSelection is mainly used to select the appropriate columns to split the dataset. Combined with the main process of J48 in the previous article, we found that ModelSelection is C45ModelSelection and BinC45ModelSelection, so we can analyze C45ModelSelection first. I. C45ModelSelect

Netease 2017 campus recruitment algorithm question C language implementation source code, 2017 campus recruitment

Netease 2017 campus recruitment algorithm question C language implementation source code, 2017 campus recruitment Question: Given an array, except for a number that appears once, the remaining number appears three times. Find the number of occurrences. For example: {1, 2, 1, 2, 1, 2, 7}, find 7. Format: Input n in the first line indicates the length of the ar

STL source code profiling algorithm set

STL source code profiling algorithm set Set AlgorithmsBytes ------------------------------------------------------------------------------------ Description: Set_union, set_difference, set_intersection, set accepted by set_symmetric_difference algorithm, It must be an ordered interval. It is applicable to set/multiset

A Simple Algorithm for randomly selecting a specified number of records based on the weight (C #) [including source code]

. The Code is as follows:/// /// Algorithm:/// 1. The weight of each ad item + 1 is named as w to prevent the value from being 0./// 2. Calculate the total weight n./// 3. Add a random number from 0 to (n-1) to the weight w of each ad item to obtain the new weight sorting value s./// 4. sort by the new weight sorting value s, and take the largest number of values in the previous s./// /// /// /// Public sta

Soundtouch audio processing database source code analysis and algorithm extraction (2)

Soundtouch audio processing database Initialization Process Analysis Define a variable soundtouch m_soundtouch; Derivation of soundtouch Export osamplepipe-> export oprocessor-> soundtouch (process [1]) Therefore, first construct the base class kerberosamplepipe, then derive the kerberoprocessor, and then derive the soundtouch from kerberoprocessor. I have to mention that the level of C ++ for foreigners is really high. Here, class inheritance is basically brought to the extreme. The ability to

Palm Finger segmentation algorithm (source code)

, imgsrc, IMG1, Contours_num,1);ExtractFingerImg2 (contours, imgsrc, Img2, Contours_num,2);ExtractFingerImg2 (contours, imgsrc, IMG3, Contours_num,3);}Else if (contours_num = = 2) {Mat img1, img2;std::VECTOR1]; std::VECTOR2]; std::VECTOR0]; ExtractFingerImg2 (contours, imgsrc, IMG1, Contours_num,1);ExtractFingerImg2 (contours, imgsrc, Img2, Contours_num,2);}Else if (contours_num = = 1) {Mat img1;std::VECTOR1]; std::VECTOR0]; ExtractFingerImg2 (contours, imgsrc, IMG1, Contours_num,1);}Else

Weka algorithm Clusterers-xmeans source code Analysis (i)

, newclustercenters);d ouble newbic = Calculatebic (newinstofcent, Newclustercenters, newMle);// Calculate a new BICPFD (D_followsplit, "newbic" + newbic); if (Newbic > M_bic) {//Assuming that the new Bic is larger than the old one, indicating that the new cluster effect is good, replace the old PFD with the new (d_fol Lowsplit, "* * * decide for new clusters"); M_bic = Newbic; M_clustercenters = newclustercenters; m_clusterassignments = newclusterassignments;} else {PFD (d_followsplit

Hmm algorithm of speech recognition and its source code

Basic"1" Understanding hmm algorithm: http://www.cnblogs.com/pangxiaodong/archive/2011/10/17/2214542.html"2" to deepen the impression again: http://blog.csdn.net/likelet/article/details/7056068"3" a review: Http://baike.baidu.com/link?url=1ajOQ5jh8lm2j234DeMJE1dA0b9N9mmGb6wFw5_-_vAlD15-PHjAg17Swm9Rr_ Cd9olko-rnvtmp-pfuxdeziqCode:free points Download:"1" http://download.csdn.net/detail/c602273091/8599943"2" http://download.csdn.net/detail/c602273091/85

MATLAB implementation of two-value image corrosion algorithm source code

1, binary image of the corrosion principle: we know that the binary image is a matrix of 0 and 1, 0 is black 1 for white, corrosion on 1 is the image of the high-gloss white part, and then the white portion outward contraction. The corrosion is similar to the Black Army's anti-offensive white Army, which eventually expands its black territory and the black font becomes thicker.2, matlab corrosion algorithm source

Soundtouch audio processing database source code analysis and algorithm extraction (3)

Soundtouch audio processing database source code analysis and algorithm extraction (3) Soundtouch audio processing database Initialization Process Analysis 2Next to soundtouch audio processing database initialization processRelationship between the tdstretch class and the base class: Export osamplepipe-> export oprocessor-> tdstretchThe class tdstretch * ptdstret

STL source code profiling algorithm stl_algo.h -- random_shuffle

STL source code profiling algorithm stl_algo.h -- random_shuffle Random_shuffle Certificate -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Description: sorts the elements of [first, last) at random. Ideas: Must be RandomAccessIterator 1. Tr

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