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原创 My Python Notes
Contents1 Introduction1.1 Basic1.2 Import modules1.3 Variables and objects2 Lists, loops and functions2.1 Type casting2.2 List2.3 Slicing2.4 Loops2.4.1 `for` loops2.4.2 `while` loops3 Defining function4 `if` statements5 Debugging and troubleshooting1 Intr
2021-10-07 20:49:22
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原创 windows用terminal window太苦了
Contents1 Basic1 BasicCommandDiscriptionCD [/D] [drive:][path]Change from one directory to another.(/D is for directory changing or just use drive: COMMAND)MKDIR [<drive>:]<path>Create subdirectories.REN [<drive>:][<
2021-09-28 16:34:04
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原创 SQL学习资源
MySQL Community Server下载: https://dev.mysql.com/downloads/mysql/MySQL文档: https://dev.mysql.com/doc/在线SQL练习: https://dbis-uibk.github.io/relax10W3Schools SQL教程: https://www.w3schools.com/sql/
2021-07-26 15:04:38
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原创 SQL数据查询
文章目录1 单关系查询1.1 投影查询1.2 选择查询1.3 聚集(Aggregation)查询2 连接查询3 嵌套查询1 单关系查询1.1 投影查询1.2 选择查询1.3 聚集(Aggregation)查询2 连接查询3 嵌套查询
2021-07-24 12:06:01
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原创 SQL数据更新
文章目录1 插入数据2 修改数据3 删除数据4 数据完整性检查5 更新视图1 插入数据2 修改数据3 删除数据4 数据完整性检查5 更新视图
2021-07-24 09:49:53
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原创 SQL数据定义
文章目录1 基本数据类型1.1 数值型1.2 日期时间型1.3 字符串型1.4 二进制串1.5 枚举型1.6 集合型2 创建关系模式3 修改关系模式4 删除关系模式5 定义视图1 基本数据类型1.1 数值型类型SQL语句参数整型INTEGER/INT, SMALLINT, TINYINT, MEDIUMINT, BIGINT定点型DECIMAL(p, s)/NUMERIC(p, s)有效数字共ppp位, 小数点后sss位浮点型FLOAT, DOUBLE
2021-07-23 16:32:42
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原创 4 随机向量,随机变量的独立性
文章目录1 随机向量及分布函数1.1 随机向量1.2 (联合) 分布函数 (Jonint C.D.F)2 常见的多元随机变量2.1 离散型2.2 连续型1 随机向量及分布函数1.1 随机向量若随机变量 ξ1(ω),ξ2(ω),...,ξn(ω)\xi_1 ( \omega ), \xi_2 ( \omega ), ..., \xi_n( \omega )ξ1(ω),ξ2(ω),...,ξn(ω) 定义在同一概率空间 (Ω,F,P)( \Omega, \mathcal{F}, \mathcal{P
2021-06-10 15:40:57
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原创 3 随机变量与分布函数
文章目录1 随机变量 (Random Variable)1.1 随机变量定义1.2 分布函数 (Distribution Function)2 离散型随机变量 (Discrete R.V.)2.1 离散型随机变量的分布率 (Probability Distribution)2.2 离散型随机变量的分布函数2.3 常见离散型随机变量分布函数3 连续型随机变量 (Continous R.V.)3.1 常见连续型随机变量分布函数1 随机变量 (Random Variable)1.1 随机变量定义函数X(e)
2021-06-08 16:42:30
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原创 2 条件概率与统计独立性
文章目录1 条件概率2 事件独立3 全概率公式1 条件概率设(Ω,F,P)(\Omega, \mathcal{F}, \mathcal{P})(Ω,F,P)是一个概率空间, B∈FB \in \mathcal{F}B∈F, 且P(B)>0P(B) > 0P(B)>0, 则∀A∈F\forall A \in \mathcal{F}∀A∈F, 记P(A∣B)=P(AB)P(B)P(A|B) = \frac{P(AB)}{P(B)}P(A∣B)=P(B)P(AB).称P(A∣B)P(A|
2021-05-27 23:02:22
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原创 1 概率论基本概念
文章目录1 随机事件及其运算1.1 基本概念1 随机事件及其运算1.1 基本概念随机试验三要素:可在同等条件下重复;结果是可被事先预测的多种可能;试验前结果不确定.样本空间 (Sample Space) : 随机试验EEE的所有可能结果的集合, 记作Ω={ω}\Omega = \{ \omega \}Ω={ω}.样本点 (Sample Point) : 一个样本空间众多的每个元素.样本空间中样本点的个数为有限个或可列个的情况为离散样本空间 (Discrete Sample Space
2021-05-27 16:28:17
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原创 Functional Data Analysis Notes - 3: Functional PCA
contents1 Multivariate Principal Components Analysis1.1 Steps of PCA1 Multivariate Principal Components AnalysisThe basic idea of Principal Components Analysis is to transform a group of potentially correlated variables into a group of linearly uncorrela
2021-04-25 14:27:16
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原创 Functional Data Analysis Notes - 2: Smoothing and Descriptive Statistics
Contents1 Fitting and smoothing1.1 Choosing the Number of Basis Functions1 Fitting and smoothing1.1 Choosing the Number of Basis FunctionsFor a single curveyi=x(ti)+ϵ,y_i = x(t_i) + \epsilon,yi=x(ti)+ϵ,we want to estimatex(t)≈∑j=1kcjϕj(t).x(t) \app
2021-02-22 21:29:11
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原创 使用表格来排版图片
<table> <tr> <td><center>Temperature of the 35 cities</center></td> <td><center>Precipitation of the 35 cities</center></td> </tr> <tr> <td><center>
2021-02-22 11:46:55
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原创 Functional Data Analysis Notes - 1: Introduction and Basis Expansion
1 Introduction1.1 Functional DataFunctional Data: Multivariate data with an ordering on the dimensions. (Muller, 2006)Key assumption is smoothness:yij=xi(tij)+ϵijy_{ij} = x_i(t_{ij}) + \epsilon_{ij}yij=xi(tij)+ϵijwithttt: in a continuum (usual
2021-02-21 14:13:34
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翻译 学术写作笔记:数学写作
文章目录用句子写作(Writing in Sentences)简明扼要结合公式和方程数字使用符号(Use of notation and symbols)图片,表格以及编号一些例子致谢“写下句子的目的是什么? 我有正确的答案。 那就是–以下几点。”数学是关于思想的。 能够以一种易于理解的方式传达您的想法是必不可少的技能。如果读者必须动用自己的智慧来发现文章意图,那么学生是因为读者的才智而不是自己的才智而获得分数。撰写良好的数学解释将提高你的知识水平,加深你对产生的想法的理解。用句子写作(Wr
2021-02-01 18:00:21
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翻译 学术写作笔记:统计学科学术写作
1 科学写作1.1 写作流程(The writing process)写作步骤(The scientific writing process)理解问题/要求(Understand the question/requirements)背景调查(Background research)提出论点(Formulate your argument)计划结构(Plan structure)开始写作(Writie)校对(Proofread)论文的构成(The components of a diss
2021-01-29 20:23:15
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原创 优快云 - Markdown常用颜色列表
** 颜色 LiceBlue AntiqueWhite Aqua Aquamarine Azure Beige Bisque Black ...
2021-01-29 19:45:19
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翻译 学术写作笔记:参考文献引用
文章目录1 科学写作1.1 写作流程(The writing process)写作步骤(The scientific writing process)论文的构成(The components of a dissertation)科学报告(Scientific report style)专题(Thematic style)1.2 收集证据(Gathering evidence)收集证据(Gathering evidence)查找文献(Sourcing literature)在阅读文献之前如何选择文献证据的结构
2021-01-29 12:55:01
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转载 Google‘s R Style Guide
转载自:http://web.stanford.edu/class/cs109l/unrestricted/resources/google-style.htmlR is a high-level programming language used primarily for statistical computing and graphics. The goal of the R Programming Style Guide is to make our R code easier to read,
2021-01-28 17:06:47
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原创 Shiny
目录1 Basic2 User Interface2.1 Lay Out2.2 HTML Content3 Add control widgets3.1 Control widgets3.2 Adding widgets4 Display Reactive Output4.1 Output in "ui" Part1 Basic一个Shiny App在一个app.R里面,然后这个script在一个路径下(例:newdir/),运行这个app使用runApp("newdir/").Shiny App由三
2020-11-29 17:31:20
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原创 Privacy Security in Big Data and Privacy-Preserving Data Mining (PPDM)
Privacy Security in Big Data and Privacy-Preserving Data Mining (PPDM)IntroductionBig data is such a hot and well-known concept in recent years that it can often be heard or seen in everyday life. In this introduction, I would first explain the definit
2020-11-16 23:42:04
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原创 The Jackknife and Bootstrap
The Jackknife and BootstrapDefine a sample from an unknown population with nnn independent observations asx=(x1,x2,...,xn)′.x = (x_1, x_2, ..., x_n)'.x=(x1,x2,...,xn)′.A statistic θ^\hat{\theta}θ^ that we are interested in is a function of the samp
2020-11-04 22:11:25
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原创 Summary of analysis for factors that influence IMDB ratings
Summary of analysisPopulationfilms in IMDB film databaseObjectiveThis project intends to use a dataset from the IMDB film database with 5 explanatory variables and the IMDB ratings to investigate which of these factors can affect whether a film’s rat.
2020-11-03 21:12:17
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原创 R Function
# Tidyverse## dplyrglimpse(data)查看数据变量类型及前几个值summarize(data, Variable = function(data, na.rm = TRUE))总结数据,可用向量到单值的函数gather(data, key = Key, value = Value)使原变量名成为新变量Key的一列值,原变量的观测值
2020-09-23 22:16:04
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原创 Markdown Mathematical Notation (Markdown数学符号)
代码结果a+ba+ba+ba+bx_ixix_ixix_1^2x12x_1^2x12x_{22}x22x_{22}x22x^{(n)}x(n)x^{(n)}x(n)^*x^*∗x∗^*x^*∗x∗x_{abcd}^{efgh}xabcdefghx_{abcd}^{efgh}xabcdefgh\frac{x+y}{2}x+y2\frac{x+y}{2}2x+y\frac{1}{1+\frac{1}{2}}11+12...
2020-09-23 22:14:34
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Critical Analysis template.docx
2021-01-29
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