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Table of Contents Chapter 5: Extracting Features with Transformers 81 Feature extraction 82 Representing reality in models 82 Common feature patterns 84 Creating good features 87 Feature selection 88 Selecting the best individual features 90 Feature creation 93 Principal Component Analysis 96 Creating your own transformer 98 The transformer API 99 Implementation details 99 Unit testing 101 Putting it all together 103 Summary 103 Chapter 6: Social Media Insight Using Naive Bayes 105 Disambiguation 106 Downloading data from a social network 107 Loading and classifying the dataset 109 Creating a replicable dataset from Twitter 114 Text transformers 118 Bag-of-words 118 N-grams 120 Other features 121 Naive Bayes 121 Bayes' theorem 122 Naive Bayes algorithm 123 How it works 124 Application 126 Extracting word counts 126 Converting dictionaries to a matrix 127 Training the Naive Bayes classifier 127 Putting it all together 128 Evaluation using the F1-score 129 Getting useful features from models 130 Summary 133 [ iii ]
Table of Contents Chapter 7: Discovering Accounts to Follow Using Graph Mining 135 Loading the dataset 136 Classifying with an existing model 137 Getting follower information from Twitter 140 Building the network 142 Creating a graph 145 Creating a similarity graph 147 Finding subgraphs 151 Connected <strong>com</strong>ponents 151 Optimizing criteria 155 Summary 159 Chapter 8: Beating CAPTCHAs with Neural Networks 161 Artificial neural networks 162 An introduction to neural networks 163 Creating the dataset 165 Drawing basic CAPTCHAs 166 Splitting the image into individual letters 167 Creating a training dataset 169 Adjusting our training dataset to our methodology 171 Training and classifying 172 Back propagation 173 Predicting words 175 Improving accuracy using a dictionary 180 Ranking mechanisms for words 180 Putting it all together 181 Summary 183 Chapter 9: Authorship Attribution 185 Attributing documents to authors 186 Applications and use cases 186 Attributing authorship 187 Getting the data 189 Function words 192 Counting function words 193 Classifying with function words 195 Support vector machines 196 Classifying with SVMs 197 Kernels 198 Character n-grams 198 Extracting character n-grams 199 [ iv ]
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Page 5 and 6: About the Author Robert Layton has
Page 7 and 8: Christophe Van Gysel is pursuing a
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Page 11: Table of Contents Preprocessing usi
Page 15 and 16: Table of Contents GPU optimization
Page 18 and 19: Preface If you have ever wanted to
Page 20 and 21: What you need for this book It shou
Page 22 and 23: Preface Reader feedback Feedback fr
Page 24 and 25: Getting Started with Data Mining We
Page 26 and 27: Chapter 1 In the preceding dataset,
Page 28 and 29: After you have the above "Hello, wo
Page 30 and 31: Chapter 1 Windows users may need to
Page 32 and 33: Chapter 1 The dataset we are going
Page 34 and 35: Chapter 1 As an example, we will co
Page 36 and 37: We get the names of the features fo
Page 38 and 39: Chapter 1 Two rules are near the to
Page 40 and 41: Chapter 1 The scikit-learn library
Page 42 and 43: We then iterate over all the sample
Page 44 and 45: Chapter 1 Overfitting is the proble
Page 46: Chapter 1 Summary In this chapter,
Page 49 and 50: Classifying with scikit-learn Estim
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Classifying with scikit-learn Estim
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Predicting Sports Winners with Deci
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Recommending Movies Using Affinity
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Chapter 4 The classic algorithm for
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Chapter 4 When loading the file, we
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Chapter 4 We will sample our datase
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Chapter 4 Implementation On the fir
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Chapter 4 We want to break out the
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The process starts by creating dict
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movie_name_data.columns = ["MovieID
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To do this, we will compute the tes
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Chapter 4 - Train Confidence: 1.000
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Extracting Features with Transforme
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Chapter 5 Thought should always be
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Chapter 5 Other features describe a
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Chapter 5 Similarly, we can convert
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Chapter 5 [18, 19, 20], [21, 22, 23
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Chapter 5 Next, we create our trans
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Chapter 5 This returns a different
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Also, we want to set the final colu
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Chapter 5 The downside to transform
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Chapter 5 A transformer is akin to
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We can then create an instance of t
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Chapter 5 Putting it all together N
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Social Media Insight Using Naive Ba
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Discovering Accounts to Follow Usin
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Chapter 7 Next, we will need a list
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Chapter 7 Make sure the filename is
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Chapter 7 cursor = results['next_cu
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Chapter 7 Next, we are going to rem
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Chapter 7 Creating a graph Now, we
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Chapter 7 As you can see, it is ver
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Chapter 7 Next, we will only add th
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Chapter 7 The difference in this gr
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Chapter 7 We can graph the entire s
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Chapter 7 Optimizing criteria Our a
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Chapter 7 Next, we need to get the
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• method='nelder-mead': This is u
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Beating CAPTCHAs with Neural Networ
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Chapter 8 The red lines indicate th
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Chapter 8 The combination of an app
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Chapter 8 Next we set the font of t
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Chapter 8 We can then extract the s
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Chapter 8 Our targets are integer v
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Chapter 8 Then we iterate over our
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Chapter 8 From these predictions, w
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Chapter 8 This code correctly predi
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The result is shown in the next gra
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Chapter 8 However, it isn't very go
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Chapter 8 Summary In this chapter,
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Authorship Attribution Attributing
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Authorship Attribution If we cannot
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Authorship Attribution After taking
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Authorship Attribution This dataset
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Authorship Attribution "instead", "
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Authorship Attribution Support vect
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Authorship Attribution Kernels When
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Authorship Attribution We can reuse
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Authorship Attribution With our dat
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Authorship Attribution We then reco
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Authorship Attribution If it doesn'
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Authorship Attribution Finally, we
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Clustering News Articles In most of
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Chapter 10 API Endpoints are the ac
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The token object is just a dictiona
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Chapter 10 We then create a list to
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Chapter 10 We are going to use MD5
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Chapter 10 Next, we develop the cod
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Chapter 10 We use clustering techni
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Chapter 10 The k-means algorithm is
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Chapter 10 We only fit the X matrix
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Chapter 10 We then print out the mo
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Chapter 10 Our function definition
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Chapter 10 The result from the prec
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Chapter 10 Implementation Putting a
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Chapter 10 Neural networks can also
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We then call the partial_fit functi
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Classifying Objects in Images Using
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Chapter 11 This dataset comes from
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You can change the image index to s
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Chapter 11 Each of these issues has
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Chapter 11 Using Theano, we can def
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Chapter 11 Building a neural networ
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Chapter 11 Finally, we create Thean
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Chapter 11 return [image,] return s
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Chapter 11 Next, we define how the
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Chapter 11 Getting your code to run
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Chapter 11 Setting up the environme
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This will unzip only one Coval.otf
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Chapter 11 First we create the laye
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Chapter 11 Finally, we set the verb
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Chapter 11 Summary In this chapter,
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Working with Big Data Big data What
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Working with Big Data Governments a
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Working with Big Data We start by c
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Working with Big Data The final ste
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Working with Big Data Getting the d
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Working with Big Data If we aren't
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Working with Big Data Before we sta
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Working with Big Data The first val
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Working with Big Data This gives us
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Working with Big Data Next, we crea
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Working with Big Data Then, make a
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Working with Big Data Left-click th
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Working with Big Data The result is
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Next Steps… Extending the IPython
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Next Steps… Chapter 3: Predicting
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Next Steps… Vowpal Wabbit http://
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Next Steps… Deeper networks These
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Next Steps… Real-time clusterings
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Next Steps… More resources Kaggle
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authorship, attributing 185-188 AWS
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feature extraction about 82 common
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NetworkX about 145 defining 303 URL
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scikit-learn package references 305
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Thank you for buying Learning Data
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Learning Python Data Visualization
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