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Python Data Analysis

Python Data Analysis

By : Idris
4.5 (13)
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Python Data Analysis

Python Data Analysis

4.5 (13)
By: Idris
Buy this Book

Overview of this book

This book is for programmers, scientists, and engineers who have knowledge of the Python language and know the basics of data science. It is for those who wish to learn different data analysis methods using Python and its libraries. This book contains all the basic ingredients you need to become an expert data analyst.
Table of Contents (20 chapters)
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Preface
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Preface
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Who this book is for
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What this book covers
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To get the most out of this book
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1
Section 1: Foundation for Data Analysis
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Section 1: Foundation for Data Analysis
2
Getting Started with Python Libraries
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Getting Started with Python Libraries
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Understanding data analysis
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The standard process of data analysis
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The KDD process
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SEMMA
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CRISP-DM
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Comparing data analysis and data science
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The skillsets of data analysts and data scientists
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Installing Python 3
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Software used in this book
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Using IPython as a shell
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Using JupyterLab
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Using Jupyter Notebooks
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Advanced features of Jupyter Notebooks
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Summary
3
NumPy and pandas
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NumPy and pandas
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Technical requirements
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Understanding NumPy arrays
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NumPy array numerical data types
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Manipulating array shapes
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The stacking of NumPy arrays
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Partitioning NumPy arrays
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Changing the data type of NumPy arrays
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Creating NumPy views and copies
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Slicing NumPy arrays
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Boolean and fancy indexing
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Broadcasting arrays
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Creating pandas DataFrames
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Understanding pandas Series
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Reading and querying the Quandl data
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Describing pandas DataFrames
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Grouping and joining pandas DataFrame
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Working with missing values
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Creating pivot tables
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Dealing with dates
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Summary
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References
4
Statistics
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Statistics
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Technical requirements
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Understanding attributes and their types
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Measuring central tendency
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Measuring dispersion
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Skewness and kurtosis
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Understanding relationships using covariance and correlation coefficients
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Central limit theorem
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Collecting samples
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Performing parametric tests
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Performing non-parametric tests
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Summary
5
Linear Algebra
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Linear Algebra
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Technical requirements
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Fitting to polynomials with NumPy
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Determinant
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Finding the rank of a matrix
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Matrix inverse using NumPy
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Solving linear equations using NumPy
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Decomposing a matrix using SVD
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Eigenvectors and Eigenvalues using NumPy
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Generating random numbers
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Binomial distribution
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Normal distribution
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Testing normality of data using SciPy
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Creating a masked array using the numpy.ma subpackage
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Summary
6
Section 2: Exploratory Data Analysis and Data Cleaning
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Section 2: Exploratory Data Analysis and Data Cleaning
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Data Visualization
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Data Visualization
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Technical requirements
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Visualization using Matplotlib
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Advanced visualization using the Seaborn package
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Interactive visualization with Bokeh
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Summary
8
Retrieving, Processing, and Storing Data
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Retrieving, Processing, and Storing Data
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Technical requirements
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Reading and writing CSV files with NumPy
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Reading and writing CSV files with pandas
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Reading and writing data from Excel
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Reading and writing data from JSON
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Reading and writing data from HDF5
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Reading and writing data from HTML tables
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Reading and writing data from Parquet
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Reading and writing data from a pickle pandas object
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Lightweight access with sqllite3
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Reading and writing data from MySQL
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Reading and writing data from MongoDB
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Reading and writing data from Cassandra
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Reading and writing data from Redis
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PonyORM
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Summary
9
Cleaning Messy Data
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Cleaning Messy Data
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Technical requirements
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Exploring data
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Filtering data to weed out the noise
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Handling missing values
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Handling outliers
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Feature encoding techniques
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Feature scaling
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Feature transformation
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Feature splitting
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Summary
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Signal Processing and Time Series
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Signal Processing and Time Series
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Technical requirements
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The statsmodels modules
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Moving averages
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Window functions
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Defining cointegration
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STL decomposition
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Autocorrelation
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Autoregressive models
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ARMA models
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Generating periodic signals
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Fourier analysis
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Spectral analysis filtering
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Summary
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Section 3: Deep Dive into Machine Learning
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Section 3: Deep Dive into Machine Learning
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Supervised Learning - Regression Analysis
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Supervised Learning - Regression Analysis
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Technical requirements
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Linear regression
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Understanding multicollinearity
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Dummy variables
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Developing a linear regression model
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Evaluating regression model performance
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Fitting polynomial regression
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Regression models for classification
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Logistic regression
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Implementing logistic regression using scikit-learn
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Summary
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Supervised Learning - Classification Techniques
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Supervised Learning - Classification Techniques
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Technical requirements
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Classification
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Naive Bayes classification
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Decision tree classification
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KNN classification
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SVM classification
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Splitting training and testing sets
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Evaluating the classification model performance
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ROC curve and AUC
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Summary
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Unsupervised Learning - PCA and Clustering
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Unsupervised Learning - PCA and Clustering
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Technical requirements
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Unsupervised learning
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Reducing the dimensionality of data
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Clustering
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Partitioning data using k-means clustering
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Hierarchical clustering
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DBSCAN clustering
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Spectral clustering
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Evaluating clustering performance
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Summary
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Section 4: NLP, Image Analytics, and Parallel Computing
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Section 4: NLP, Image Analytics, and Parallel Computing
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Analyzing Textual Data
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Analyzing Textual Data
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Technical requirements
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Installing NLTK and SpaCy
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Text normalization
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Tokenization
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Removing stopwords
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Stemming and lemmatization
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POS tagging
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Recognizing entities
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Dependency parsing
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Creating a word cloud
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Bag of Words
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TF-IDF
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Sentiment analysis using text classification
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Text similarity
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Summary
17
Analyzing Image Data
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Analyzing Image Data
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Technical requirements
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Installing OpenCV
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Understanding image data
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Color models
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Drawing on images
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Writing on images
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Resizing images
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Flipping images
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Changing the brightness
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Blurring an image
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Face detection
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Summary
18
Parallel Computing Using Dask
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Parallel Computing Using Dask
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Parallel computing using Dask
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Dask data types
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Dask Delayed
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Preprocessing data at scale
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Machine learning at scale
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Summary
19
Other Books You May Enjoy
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Other Books You May Enjoy
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Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Notice that numpysum() does not need a for loop."

A block of code is set as follows:

def pythonsum(n):
   a = range(n)
   b = range(n)
   c = []

   for i in range(len(a)):
       a[i] = i ** 2
       b[i] = i ** 3
       c.append(a[i] + b[i])

   return c

Any command-line input or output is written as follows:

$ yum install python-numpy

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "Click on the Next button."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

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