is going when it is initialized, or we don't know where the driving direction is, only after the learning algorithm has been running long enough that the white section appears in the entire gray area, showing a specific direction of travel. This means that the neural network algorithm at this time has chosen a clear direction of travel, not like the beginning of the output of a faint light gray area, but the output of a white section.Stanford Univers

decision trees (decision tree) 4
Cited examplesThe existing training set is as follows, please train a decision tree model to predict the future watermelon's merits and demerits.Back to Catalog
What are decision trees (decision tree) 5
Cited examplesThe existing training set is as follows, please train a decision tree model to predict the future watermelon's merits and demerits.Back to Catalog
What are decision trees (decision tree) 6

PHP-ML is a machine learning library written using PHP. While we know that Python or C + + provides more machine learning libraries, in fact, most of them are slightly more complex and configured to be desperate for many novices. PHP-ML This machine

KNN (K Nearest Neighbor) for Machine Learning Based on scikit-learn package-complete example, scikit-learnknn
KNN (K Nearest Neighbor) for Machine Learning Based on scikit-learn package)
Scikit-learn (sklearn) is currently the most popular and powerful Python library for

In peacetime research, hope every night idle down when, all learn a machine learning algorithm, today see a few good genetic algorithm articles, summed up here.1 Neural network Fundamentals Figure 1. Artificial neural element modelThe X1~XN is an input signal from other neurons, wij represents the connection weights from neuron j to neuron I,θ represents a threshold (threshold), or is called bias (bias).

only in the limited target set value).Third, the algorithm example and explanationExamples in the case of "machine learning Combat" in the book, code examples are written in Python (need NumPy Library), but the algorithm, as long as the algorithm is clear, in other languages can be written out: Helen has been using

Based on the literal Relevance Model of Baidu keyword search recommendation tool, this article introduces the specific design and implementation of a machine learning task. Including target setting, training data preparation, feature selection and filtering, and model training and optimization. This model can be extended to Semantic Relevance models, and the design and implementation of Search Engine releva

-GROWTH algorithm to efficiently discover frequent itemsets
Part IV Other tools
13.) Use PCA to simplify data
14.) Simplify data with SVD
15.) Big Data and MapReduce
Part V Project Combat (non-textbook content)
16.) Recommendation System
Periodic summary
Summary of the first phase of 2017-04-08_
Appendix A, getting Started with Python
Appendix B Linear Algebra
Appendix C Review of probability theory
Appendix D Resources

[y_hat1==0]=3y_hat1[y_hat1==1]=0y_hat1[y_hat1==3]=1mu1=np.array ([Np.mean (X[Y_HAT1 = = i], axis=0) For I in range (3)]) print ' k-means mean = \ n ', Mu1print ' classification correct rate is ', Np.mean (y_hat1==y) gmm=gaussianmixture (n_components=3, Covariance_type= ' full ', random_state=0) gmm.fit (x) print ' gmm mean = \ n ', gmm.means_y_hat2=gmm.predict (x) y_hat2[y_hat2== 1]=3y_hat2[y_hat2==2]=1y_hat2[y_hat2==3]=2print ' classification correct rate for ', Np.mean (y_hat2==y)The output re

We all should have the experience of buying watermelon in our lives. When buying watermelon, elders will give us experience, such as tapping on the surface of the melon to make some kind of sound is a good melon. The reason why elders will make good melons based on such characteristics is based on their life experience, and with the rich experience, they predict the ability of good melon is also improving. Herbert A. Simon has given the following definition of "

guesses, and certainly not very accurate at first. But based on this speculation, it can be calculated that each person is more likely to be male or female distribution. For example, a person's height is 1.75 meters, obviously it is more likely to belong to the male height of this distribution. Accordingly, we have a attribution for each piece of data. Then, according to the maximum likelihood method, the parameters of male height normal distribution

Machine Learning: this paper uses the analysis of the taste of red wine as an example to describe the cross-validation arbitrage model.
The least squares (OLS) algorithm is commonly used in linear regression. Its core idea is to find the best function matching of data by minimizing the sum of squares of errors.
However, the most common problem with OLS is that it

remaining B (n,k)?
Take B (4,3) as an example to see if we can use B (3,?). Solve.
B (4,3) = 11, can be divided into two categories: one is x4 in pairs appear, a class is x4 into a single appearance.
Because k=3, so any 3 points can not shatter, namely: Α+β≤b (3,3).
And because for 2α, X4 is in pairs appear, so, x1,x2,x3 any two points must not shatter, otherwise, plus X4, there will be three points are shatter. namely: Α≤b

. summaries.py includes an auxiliary function to generate the day to record, summaries_test.py is one of its tests, using the example below:
Import TensorFlow as TFSlim = Tf.contrib.slim
Slim.summaries.add_histogram_summaries (Slim.variables.get_model_variables ())Slim.summaries.add_scalar_summary (Total_loss, ' total loss ')Slim.summaries.add_scalar_summary (learning_rate, ' learning rate ')Slim.summaries.

[i]) if (classifierresu Lt! = Datinglabels[i]): ErrOrcount + = 1.0 print "The total error rate is:%f"% (Errorcount/float (numtestvecs)) Print error count def img2vector (filename): Returnvect = zeros ((1,1024)) FR = open ( FileName) For I in range (+): LINESTR = Fr.readline () F or J in range (+): RETURNVECT[0,32*I+J] = Int (linestr[j]) RETURN RET Urnvectdef handwritingclasstest (): hwlabels = [] trainingfilelist = Listdir (' trainingDigits ') #load the training

Learn the use of Cuda libraries by learning the examples of Nvidia Matrixmul.
Brief part of the rubbish. Just say the core code.
This example is a matrix multiplication that implements C=a*b
Use a larger blocks size for Fermi and above
int block_size =;
Original:
dim3 Dimsa (5*2*block_size, 5*2*block_size, 1);
Dim3 DIMSB (5*4*block_size, 5*2*b

purchases, and 12 for the total number of units. According to the formula of information entropy we can conclude that the information entropy of this data set is:Divided by lot (denoted by A1), Tri-Ring (D1), five-ring (D2), six-ring (D3), to calculate information gainBy whether near the Metro (denoted by A2), is (D1), no (D2), to calculate the information gaindivided by area (denoted by A3), 60 ping (D1), 80 ping (D2), to calculate information gainDivided by unit Price (expressed in A4), 5w (D

I have studied Chinese character encoding, including the Chinese character location code and internal machine code. It is very interesting and practical. Generally, we use the location code in the cards. For example, the location code

each parameter corresponding to 44 is the value of J_vals (i,j) end46 end47 j_vals = J_vals ';% Surface plot49 Figure;50 Surf (theta0_vals, theta1_vals, j_vals)% draws an image of the parameter and loss function. Pay attention to use this surf compare egg ache, surf (x, y, z) is such, Wuyi%x,y is a vector, Z is a matrix, with X, Y paved grid (100*100 point) and Z of each point 52 to form a graph, but how to correspond to where, the egg hurts is, The second element of your x with the first eleme

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