About Yixf

世事浮沉如落木,人生聚散似漂萍。
10月 28

[文献合集]Statistics notes from The BMJ

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

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

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

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

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】