R Markdown

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What is rMarkdown?

R Markdown documents are fully reproducible. Use a productive notebook interface to weave together narrative text and code to produce elegantly formatted output. Use multiple languages including R, Python, and SQL. – rmarkdown official site

R Markdown supports dozens of static and dynamic output formats including HTML, PDF, MS Word, Beamer, HTML5 slides, Tufte-style handouts, books, dashboards, shiny applications, scientific articles, websites, and more. – rmarkdown official ...

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About ggplot2 for R

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What is ggplot2

ggplot2 is a plotting system for R, based on the grammar of graphics, which tries to take the good parts of base and lattice graphics and none of the bad parts. It takes care of many of the fiddly details that make plotting a hassle (like drawing legends) as well as providing a powerful model of graphics that makes it easy to produce complex multi-layered graphics. – http://ggplot2.org/

R Basics

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R is a free software environment for statistical computing and graphics. The following is some basics about R data types.

Comparison of vector,list,matrix and dataframe

  vector list matrix dataframe
creation c list matrix data.frame
same type Y N Y N
class class of its elements list matrix data.frame
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How to burn videos longer than 2 hours on a DVD5

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Preamble

Three great virtues of a programmer; Laziness, Impatience and Hubris. – Larry Wall

  1. Laziness: The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful and document what you wrote so you don’t have to answer so many questions about it.
  2. Impatience: The anger you feel when the computer is being lazy. This makes you write programs that don’t ...
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