四叉树
这是Quadtree的Java实现，Quadtree是一种树数据结构，可用于存储2D位置数据。
用法
创建新的四叉树
从点（0,0）开始以400 x 400尺寸初始化世界
// init.
Dimension dimension = new Dimension ( 400 , 400 );
Position2D position = new Position2D ( 0 , 0 );
QuadTree< Point> KD = new QuadTree< Point> (position, dimension);
// populate with random points.
Random random = new Random ();
List< Point> pointList = new LinkedList<> ();
for ( int i = 0 ;
2022-05-21 14:41:16
14KB
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Python, a multi-paradigm programming language, has become the language of choice for data scientists for visualization, data analysis, and machine learning.
Hands-On Data Analysis with NumPy and Pandas starts by guiding you in setting up the right environment for data analysis with Python, along with helping you install the correct Python distribution. In addition to this, you will work with the Jupyter notebook and set up a database. Once you have covered Jupyter, you will dig deep into Python’s NumPy package, a powerful extension with advanced mathematical functions. You will then move on to creating NumPy arrays and employing different array methods and functions. You will explore Python’s pandas extension which will help you get to grips with data mining and learn to subset your data. Last but not the least you will grasp how to manage your datasets by sorting and ranking them.
By the end of this book, you will have learned to index and group your data for sophisticated data analysis and manipulation.
What You Will Learn
• Understand how to install and manage Anaconda
• Read, sort, and map data using NumPy and pandas
• Find out how to create and slice data arrays using NumPy
• Discover how to subset your DataFrames using pandas
• Handle missing data in a pandas DataFrame
• Explore hierarchical indexing and plotting with pandas
2022-05-21 14:35:08
8.83MB
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Python for Data Analysis-带书签目录超清文字版英文版
这个是带完整目录书签的文字版本，文本内容可以复制的哦
2022-05-21 14:02:40
13.14MB
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Title: Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython, 2nd Edition
Author: Wes McKinney
Length: 550 pages
Edition: 2
Language: English
Publisher: O'Reilly Media
Publication Date: 2017-09-25
ISBN-10: 1491957662
ISBN-13: 9781491957660
Table of Contents
Chapter 1 Preliminaries
Chapter 2 Python Language Basics, IPython, and Jupyter Notebooks
Chapter 3 Built-in Data Structures, Functions, and Files
Chapter 4 NumPy Basics: Arrays and Vectorized Computation
Chapter 5 Getting Started with pandas
Chapter 6 Data Loading, Storage, and File Formats
Chapter 7 Data Cleaning and Preparation
Chapter 8 Data Wrangling: Join, Combine, and Reshape
Chapter 9 Plotting and Visualization
Chapter 10 Data Aggregation and Group Operations
Chapter 11 Interlude: Data Analysis Examples
Chapter 12 Time Series
Chapter 13 Advanced NumPy
Chapter 14 Using Modeling Libraries with pandas
Chapter 15 Examples Data Sets
Appendix Advanced IPython and Jupyter
2022-05-21 14:02:08
5.23MB
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