Welcome to LZN's Blog!
Wind extinguishes a candle but energizes fire.-
【Coursera】Data Scientist's Toolbox
MaterialW1-L1core: how to use data to solve questionsdata deluge 数据泛滥 Big data统计学是毕业生职场的敲门砖We are lucky: explosive data growing利用数据设计算法、分析预报获得结论的比赛 projectWhy R 1. various packages 2. free 3. Stack Overflow mining the web 处理技巧-数学和统计知识-专业知识 
W1-L2
利用R的IDE RStudio
R script xxx.R
# 注释符号
Rmd R markdown document
portfolio github仓库
W1-L3
use message board
Often the fastest answer is the one you find yourself
R帮助
？function_name
help.search("rnorm")
args("rnorm")
--> fuction (n, mean = 0, sd =1)
NULL
直接输入函数名称，可以得到函数的解释
提问的艺术：
Provide the minimum information
good question:
R 2.15.0 lm() function on Mac OS X 10.6.3 seg fault
W1-L4
数据的分散性决定了Hacking Skills的重要性
Cross Validated
永远学习，永远勇于接受新事物！
采用Stack overflow搜索关于R的内容时，要采用标签 如[r]，仅用r作为关键词会搜索到很多无用的东西
用google的时候：
"[data type] data analysis"
"[data type] R package" (better)
W1-L5
subsetting data 抽取数据
readlines function
lapply 很有趣的函数，对一个列表中的所有元素采用某一个函数去执行
W1-L6
clustering 聚类分析
W1-L7
数据科学家最基本的素质：reproducible research
需要用到LaTex
W1-L8
likelihoods 似然估计
common distribution 常用概率分布
confidence interval 置信区间
hypothesis test 假设检验
bootstrapping 自助法 * 自抽样？
power 统计功效
W1-L9
回归分析的调整分析 adjusting analysis
W1-L10
boosting
bagging
W1-L11
Shiny 交互式R共享
W1-L12
Windows下安装R
www.Rseek.org
W2-L2
Command Line Interface:
command flags arguments
cp -r ./ ../test
W2-L3
Introduction to Git
$git config --list
$git config --global user.name ""
$git config --global user.email ""
W2-L7
markdown
readme.md
##hello (## means secondary heading)
* hello
* world (unordered list)
W2-L8
R packages
install.packages("slidify")
library("xxx") #load the function
W3-L4
http://figshare.com
Point Measure
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【Shanbei News Notes】20150708
Lawyers: Cosby's Drugs-Sex Admission Could Aid Women's Cases 律师称：考斯比承认使用安眠酮，或有助于性侵指控
civil case 民事诉讼
criminal charge field 刑事指控领域
admission 承认
bolster: to give support to sth
file in 编入
Carnival Aims to Launch Miami-Cuba Cruises in May 2016 嘉年华集团获得美国政府批准于2016年五月开通迈阿密-古巴邮轮航线
a handful of 少量
charter fight 包机
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【Shanbei News Notes】20150707
Analysts: Greece Now More Likely to Leave Euro 分析师：希腊目前更可能离开欧元区
deeper austerity and greater cuts in spending in exchange for additional loans （通过）更深入的财政紧缩和更大的削减开支以换取额外的贷款
issue ious 发布借据 issue动词作“发布”意， iou=I owe you 借据，欠款
repay loans denominated in the euro currency 以欧元的名目还贷
go bust 破产
resume bargaining 恢复谈判
pressing 紧迫的
Goldman Sachs 高盛集团
egregious mismanagement 过分的管理不善
parlous state 危险的境地
a staunch opponent of debt relief 债务减免的坚决反对者
or be forced to pay a “risk premium” [high interest rate] to get loans 被迫支付一个高的“风险溢价”（高息）以获得贷款
she expects the crisis to cause volatility and sell-offs in European markets and have potentially serious long-term political implications for Europe 她预计这场危机将导致欧洲市场的波动和抛售，并有可能造成潜在的长期政治影响。
reaction in the bond market has been “muted” so far 债券市场的反应一直是“静音状态”