Category Archives: 所有博文

各个分类目录的汇总

12月 09

TED基因组学与人类未来——中国肿么了？

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【位于视频中大约20:20的位置】印度和中国对世界经济的贡献曾达到40%，不过只是在工业革命期间，现在只占到4.8%。两国合起来有20亿人口，占世界人口的1/3，产生的财富仅占世界的5%。因为他们没有顺势而变，因为统治者把他们的国民看做是农奴，而不是具有共同利益的投资人。统治者不懂得留住受过教育的人才，不刺激商业发展，不做上市，但硅谷懂得这么做，这是为什么硅谷因为懂得网罗人才而取得不断的发展，而不是像印度或中国那样单单去发展集成电路。……【阅读全文】

10月 28

[文献合集]Statistics notes from The BMJ

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Statistics notes from The BMJ

  • Interpreting diagnostic accuracy studies for patient care
  • Brackets (parentheses) in formulas
  • How to obtain the P value from a confidence interval
  • Comparisons within randomised groups can be very misleading
  • Correlation in restricted ranges of data
  • Analysis of continuous data from small samples
  • Parametric v non-parametric methods for data analysis
  • Missing data
  • The cost of dichotomising continuous variables
  • Standard deviations and standard errors
  • Treatment allocation by minimisation
  • Diagnostic tests 4: likelihood ratios
  • The logrank test
  • Interaction revisited: the difference between two estimates
  • Validating scales and indexes
  • Analysing controlled trials with baseline and follow up measurements
  • Concealing treatment allocation in randomised trials
  • Blinding in clinical trials and other studies
  • …
……【阅读全文】

10月 23

[荐]一些在线工具类的网站

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欢迎朋友们予以补充！……【阅读全文】

10月 20

[荐]Quickly create online and interactive plots using Plot.ly

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As readers likely know putting your data online as interactive visualizations can be a lot of work. We like to use D3, Highcharts and the Google visualization API but all of these tools require some serious programming. When you’re building a website with custom data visualization the effort might make sense, but when you have data you want to share quickly and elegantly a new data visualiation tool, Plot.ly, is a nice option. You can create graphics by uploading data and manually setting plot options or you can create and upload directly from Python, R or other environments.……【阅读全文】

10月 20

[荐]Beautiful plotting in R: A ggplot2 cheatsheet

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Even the most experienced R users need help creating elegant graphics. The ggplot2 library is a phenomenal tool for creating graphics in R but even after many years of near-daily use we still need to refer to our Cheat Sheet. Up until now, we’ve kept these key tidbits on a local PDF. But for our own benefit (and hopefully yours) we decided to post the most useful bits of code.……【阅读全文】

10月 20

[荐]数据科学家教你用数据模型来恋爱

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男生和女生分别是来自不同星球的科学事实已经众所周知的了。男生们总是认为，女生们都是迷一样的生物，他们的情感状态浮动似乎是以秒单位在变化的，难以理解，更勿论预测了！ 而女生们觉得男生都是没有感觉动物，完全不能理解什么叫感受——尽管已经告诉他们N次了！这种男女之间的根本差别，导致了他们之间的感情关系是受一种超级无敌复杂的系统所支配的。……【阅读全文】