Http://www.csdn.net/article/2012-12-28/2813275-Support-Vector-Machineabsrtact: support vector Machine (SVM) has become a very popular algorithm. This paper mainly expounds how SVM works, and also gives some examples of using Python scikits library. As an algorithm for training machine learning, SVM can be used to solve
This paper mainly records the contents of the second chapter in "Machine Learning in Action". The book introduces KNN (k nearest neighbors) with two specific examples, namely:
Date Object Predictions
Handwritten digit recognition
With the "Date Object" function, it is basic to understand how the KNN algorithm works. Handwritten numeral recogniti
specific job requirements, image algorithm For example, now deep learning hot not I said, so the basic convolution neural network algorithm , image classification , image detection The more famous paper in recent years should read it. If you have a condition, use it like a caffe,tensorflow frame.2. Machine Learning EngineerThis post is basically the same as the
See Professor Max Welling on the home page there are a lot of learning notes, a collection of it, its recently published a book it has not yet seen.Http://www.ics.uci.edu/~welling/classnotes/classnotes.htmlStatistical Estimation [PS]-Bayesian estimation-Maximum a posteriori (MAP) estimation-Maximum likelihood (ML) estimation-Bias/variance Tradeoff Minimum description length (MDL)expectation maximization (EM) algorithm [PS]- Detailed derivation plus
is no need to know the denominator, because:
1. Gaussian discriminant analysis
The first generation of learning algorithms, let's take a look at Gaussian discriminant analysis (GDA). In this model, we assume that P (x | Y) is based on a multivariate normal distribution.
Before we begin to introduce the GDA model itself, it is easy to understand the nature of the multivariate normal distribution.
1.1. Multivariate Normal distribution
The multivariate
little use.####################### #小 ********** Knot ###############################1, here is simply a hmm model to analyze the stock data examples, although the practical value is not small, but can give other complex algorithms to provide a little thought.2, or that sentence, away from the stock market, away from harm.#################################################################Note: This section of the code has been uploaded to ( my GitHub),
For the practical use of machine learning. It is not enough to know the level of light, and we need to dig deeper into the problems encountered in the practical. I'm going to make a tidy up of some trivial knowledge points.1 Data imbalance issuesThis problem is often encountered.Take a supervised study of the two classification problem. We need the annotations of both positive and negative
ArticleDirectory
Welcome to Deep Learning
SVM Series
Explore python, machine learning, and nltk Libraries
8. http://deeplearning.net/Welcome to Deep Learning
7. http://blog.csdn.net/zshtang/article/category/870505
SVD and LSI tutorial
6. http://blog.csdn.net/shikai1030/article/details/7182312
Gaussian di
1. What are decision Trees (decision tree) Decision tree is a tree structure similar to a flowchart, where each tree node represents a test on an attribute, Each branch represents the output of a property, and each leaf node represents the distribution of a class or class, and the topmost layer of the tree is the root node of the Tree. cite an example. Xiao Ming students want to enjoy swimming according to the weather: There are 6 properties, a sample is an example, the concept of
baskets" are used as examples, such as x and Y respectively, to buy two kinds of goods, then we have the following three key measures of their relevance:1. The confidence level of the association rule X->y (confidence), that is, how much the customer buying x will buy y at the same time:650) this.width=650; "Src=" http://img.blog.csdn.net/20150413171447334?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqvd2luzghhd2tfzmx5/font/5a6l5l2t/fontsize/400/fill/
This book is available in English electronic version: Machinelearning with R-second Edition [Ebook].pdf(included source)Evaluation Book: entry-level good book, introduced a variety of machine learning methods, all with r related to the implementation of the package, the case is very detailed, theory and examples combined. DirectoryChapter I. Introduction TO
One problem: Beautiful StringThis is the 2014 Microsoft School Recruit programming problem, test instructions roughly as follows:If a string consists of three or more groups of consecutive ascending letters, each set of equal lengths, then we call this string beautiful
Examples of compliant beautiful string: ABC, CDE, AABBCC, AAABBBCCC
Inconsistent Beautiful string Example: Abd,cba,aabbc,zabEnter a string containing only lowercase letters
The algorithm we learned today is the KNN nearest neighbor algorithm. KNN is an algorithm for supervised learning classifier classification. Next we will discuss in detail
Preface
I recently started to learn machine learning. I found a book about machine learning on the Int
This series is a personal learning note for Andrew Ng Machine Learning course for Coursera website (for reference only)Course URL: https://www.coursera.org/learn/machine-learning Exercise 7--k-means and PCA
Download coursera-Wunda-Machin
The first article in the blog park, but will not be the last article. Although the name of machine learning sounds like a bluff, we know that every seemingly professional noun is used to make a small white one. So for those seemingly professional nouns, we need to understand what they are talking about, perhaps this is what I have been pursuing the spirit of hacker.The K-Nearest neighbor algorithm is a rela
Norm rule in machine learning (II.) kernel norm and rule item parameter selection[Email protected]Http://blog.csdn.net/zouxy09In the previous blog post, we talked about the l0,l1 and L2 norm, which we ramble about in terms of nuclear norm and rule parameter selection. Knowledge is limited, the following are some of my superficial views, if the understanding of the error, I hope that everyone to correct. Tha
1. Howding InequalitiesIn a jar, there are a lot of small balls, they are divided into two colors {orange, green}. Randomly grab n balls from a jar. Set: The percentage of orange balls in the jar is μ (unknown), and the ratio of the orange balls in the sample is ν (known). According to the howding inequality in probability theory (hoeffding's inequality) if n is large enough, ν is likely to be close to μ.Similarly, in machine
mistakenly classified data (x, y), there is-y (wx + B)> 0 (Buddha said: Too lazy to say ). Then there is a loss function (proving something to die ):
Then the loss function is minimized (-_-zzz ):
The perception machine learning algorithm is drive by mistake (the word "driven" sounds very powerful), and the Stochastic Gradient Descent Method (which will be written later ), evaluate the skewness for W
, and a system became moreis orderly, the information entropy is lower, conversely, the more chaotic a system, the higher the information entropy. So information entropy can be thought of as an orderly system.A measure of the degree of\[h (x) =-\sum_{i=1}^{n} p_{i} log_{2} p_{i} \]Third, information gain information GainThe information gain is for one characteristic, that is, to see a characteristic, the system has it and the amount of information when it is not, bothThe difference is the amount
the curve is above the Curve.The common convex functions are:
exponential function f (x) =ax;a>1
Negative logarithm function? logax;a>1,x>0
Two-time function of opening up
The decision of the convex function:1, If F is a first-order, x, y in any data domain satisfies F (y) ≥f (x) +f′ (x) (y?x)2. If f is a differentiable guide,Examples of convex optimization applications
SVM: which consists of max|w| Turn min (12?| W|2)
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