R is a programming language created in 1993 by Ross Ihaka.
R is an open source programming language and software environment for statistical computing and graphics that is supported by the R Foundation for Statistical Computing. The R language is widely used among statisticians and data miners for developing statistical software and data analysis. Polls, surveys of data miners, and studies of scholarly literature databases show that R's popularity has increased substantially in recent years. Read more on Wikipedia...
#11on PLDB  29Years Old  1.1mUsers 
print("Hello, world!")
cat("Hello World")
# Hello World in R
cat("Hello world\n")
hello < function() {
print("hello, world!")
}
hello()
install.packages("caTools") # install external package
library(caTools) # external package providing write.gif function
jet.colors < colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan", "#7FFF7F",
"yellow", "#FF7F00", "red", "#7F0000"))
dx < 400 # define width
dy < 400 # define height
C < complex( real=rep(seq(2.2, 1.0, length.out=dx), each=dy ),
imag=rep(seq(1.2, 1.2, length.out=dy), dx ) )
C < matrix(C,dy,dx) # reshape as square matrix of complex numbers
Z < 0 # initialize Z to zero
X < array(0, c(dy,dx,20)) # initialize output 3D array
for (k in 1:20) { # loop with 20 iterations
Z < Z^2+C # the central difference equation
X[,,k] < exp(abs(Z)) # capture results
}
write.gif(X, "Mandelbrot.gif", col=jet.colors, delay=100)
if else repeat while function for in next break TRUE FALSE NULL Inf NaN NA NA_integer_ NA_real_ NA_complex_ NA_character_ ...
Feature  Supported  Example  Token 

Conditionals  โ  
Functions  โ  
While Loops  โ  
Booleans  โ  TRUE FALSE  
Assignment  โ  =  
Print() Debugging  โ  
Line Comments  โ  # A comment 
# 
Pipes  โ  # R has pipes via a library like dplyr starwars %>% filter(species == "Droid") 

Operator Overloading  โ  
Lazy Evaluation  โ  
File Imports  โ  source("filename.r") 

Comments  โ  # A comment 

Bitwise Operators  โ  ! x x & y x && y x  y x  y xor(x, y) 

Strings  โ  "hello world" 
" 
Semantic Indentation  ฯด  
MultiLine Comments  ฯด 
repo  stars  description 

bookdown  1586  Authoring Books and Technical Documents with R Markdown 
r4ds  2051  R for data science: a book 
tidytuesday  1062  Official repo for the #tidytuesday project 
shiny  3527  Easy interactive web applications with R 
rmarkdown  1596  Dynamic Documents for R 
swirl_courses  3009  ๐ A collection of interactive courses for the swirl R package. 
rnaseq_tutorial  767  "Informatics for RNAseq: A web resource for analysis on the cloud. Educational tutorials and working pipelines for RNAseq analysis including an introduction to: cloud computing critical file formats reference genomes gene annotation expression differential expression alternative splicing data visualization and interpretation." 
seurat  540  R toolkit for single cell genomics 