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Original address: http://blog.csdn.net/abcjennifer/article/details/7716281This column (machine learning) includes linear regression with single parameters, linear regression with multiple parameters, Octave Tutorial, Logistic Regression, regularization, neural network, design of the computer learning system, SVM (Support vector machines), clustering, dimensionali
KNNAlgorithmIt is an excellent entry-level material for machine learning. The book explains as follows: "There is a sample data set, also known as a training sample set, and each data in the sample set has tags, that is, we know the correspondence between each piece of data in the sample set and its category. After entering new data without tags, compare each feature of the new data with the features corres
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Preface:
Last sentArticleIt's almost half a month. Over the past half month, I have been exploring the way to mach
very little λ for a limited amount of time. For example, suppose our model needs to be trained for 1 days, which is commonplace in deep learning, and then we have one weeks, then we can only test 7 different λ. That's the best you'll ever get. That's the blessing of the last life. What's the way? Two: One is to try to test 7 more reliable λ, or lambda search space we try to be wide, so the general choice o
large amount of computation, Not very necessary. regularization error function and its partial derivative realizationColumn-only key section code 1 linear regression h = X*theta;theta_tmp = Theta (2:length (theta), 1); h-y ) ' * ( h-y ) + lambda/(2*m) * SUM ( theta_tmp .^2); Grad = 1/m * x ' * (h y) + (lambda/m) *[0;theta_tmp]; 2 logistic regression h = sigmoid (x*theta);theta_tmp = Theta
angular regression and lasso
Lars
Description: How to find which function is provided by which package: http://cran.rstudio.com/->task views->machine learning-> Search "keyword, such as Lars"The execution code is as followsinstall.packages("lars"#http://cran.rstudio.com/ ->TASK Views->Machine Learning-
standardize the features first. The second function, Ridgetest (), first standardizes the data, making the characteristics of each dimension equally important. You can then output a weight matrix of 30 different lambda. Then plot the ridge regression as shown in Figure 5. For the determination of Ridge regression parameters, we can use the ridge trace method, which is the lambda value taken in a place wher
Rules for machine learning norms (two) preferences for nuclear power codes and rules[Email protected]Http://blog.csdn.net/zouxy09On a blog post, we talked about L0. L1 and L2 norm. In this article, we ramble about the nuclear norm and rule term selection.Knowledge is limited, and below are some of my superficial views, assuming that there are errors in understanding, I hope you will correct me. Thank you.Th
(file) # Open the previously saved code # File.close ()#或者自动关闭方案With open (' Pickle_exm.pickle ', ' RB ') as File:a_dic=pickle.load (file)30. Use set to find differentChar_list=[' A ', ' B ', ' C ', ' C ']print (set (char_list)) #使用set进行不同查找, output is a non-repeating sequence, sorted by hash sentence= ' Welcome to Shijiazhuang ' Print (set (sentence)) #可以分辨句子中的不同字母 and presented in a single form# 31, regular expressions (to be added)import Re #引入正则表达式pattern1 = "Cat" pattern2= ' dog ' string=
randomly groups the data to the extent that training intensive accounts for 70% of the original data (this ratio can vary depending on the situation), and the test error is used as the criterion when selecting the model.
The question comes from the Stanford University Machine Learning course on Coursera, which is described as follows: the size and price of the existing 47 houses requires the creation of a
found on the internet there are a lot of principles to explain, in fact, this everyone will almost, very few provide code reference, I here Python directly realized, the back will also implement the neural network, regression tree and other types of machine learning algorithmsfirst to a small test sledgehammer, personal expression ability is not very good, we forgive briefly say your own understanding : tra
Documenting today's exploration of machine learning directions, the Unit's laboratory environment is comfortable to use. Praise.Record my every step in the field of machine learning to grow. This experimental material was taken from Mr. Lin Dague's Big Data analysis and machine
calculate a result for the RDD. Spark's lazy calculation conversion operation is only really calculated when it is used in the first action operation.Common RDD Conversion Operations map (): Receives a function that uses this function for each element of the RDD and returns the result of the function as the value of the corresponding element in the RDD. Lambda expressionfilter (): Receives a function and returns the element in the RDD that satisfies
100 points were made using 4x+5y=2000 as the dividing line;The initial dividing line is 0, 0;After 1000 rounds of correction, the result is:X+31 y = 11876Comparison results 4 x + 5 y = 2000is still relatively close.Just beginning to update w the line of code mistaken, thought is to use predict to correct, in fact, should use the real value of sample to correct.Import random;def find_split (points): w= (0,0,0) For _ in range (1,2000): print ' w= ' +str (w); For PT in points:
Here is still to recommend my own built Python development Learning Group: 483546416, the group is the development of Python, if you are learning Python, small series welcome you to join, everyone is the software Development Party, not regularly share dry goods (only Python software development-related), Including a copy of my own 2018 of the latest Python advanced materials and high-level development tutor
Small task: Achieve picture classification1. Picture materialPython bulk compress jpg images: PiL library resizehttp://blog.csdn.net/u012234115/article/details/502484092. Environment ConstructionInstallation version of Python under Windows comparison 2.7 vs 3.6Https://pypi.python.org/pypiInstallation of the PIL Library under WindowsHttps://pypi.python.org/pypiInstallation of the PIL Library under Windowshttp://zjfsharp.iteye.com/blog/2311523Installation and upgrade of PIP under Windowshttp://blo
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