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<title>CodeMirror: R mode</title><meta charset="utf-8"/><link rel=stylesheet href="../../doc/docs.css">
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<article><h2>R mode</h2><form><textarea id="code" name="code">X <- list(height = 5.4, weight = 54)cat("Printing objects: "); print(X)print("Accessing individual elements:")cat(sprintf("Your height is %s and your weight is %s\n", X$height, X$weight))
# Functions:square <- function(x) { return(x * x)}cat(sprintf("The square of 3 is %s\n", square(3)))
# In R, the last expression in a function is, by default, what is# returned. The idiomatic way to write the function is:square <- function(x) { x * x}# or, for functions with short content:square <- function(x) x * x
# Function arguments with default values:cube <- function(x = 5) x * x * xcat(sprintf("Calling cube with 2 : %s\n", cube(2)) # will give 2^3cat(sprintf("Calling cube : %s\n", cube()) # will default to 5^3.
powers <- function(x) list(x2 = x*x, x3 = x*x*x, x4 = x*x*x*x)
cat("Powers of 3: "); print(powers(3))
# Data framesdf <- data.frame(letters = letters[1:5], '#letter' = 1:5)print(df$letters)print(df$`#letter`)
# Operators:m1 <- matrix(1:6, 2, 3)m2 <- m1 %*% t(m1)cat("Matrix product: "); print(m2)
# Assignments:a <- 1b <<- 2c = 34 -> d5 ->> e</textarea></form> <script> var editor = CodeMirror.fromTextArea(document.getElementById("code"), {}); </script>
<p><strong>MIME types defined:</strong> <code>text/x-rsrc</code>.</p>
<p>Development of the CodeMirror R mode was kindly sponsored by <a href="https://twitter.com/ubalo">Ubalo</a>.</p>
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