You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.5 KiB
88 lines
2.5 KiB
<!doctype html> |
|
|
|
<title>CodeMirror: R mode</title> |
|
<meta charset="utf-8"/> |
|
<link rel=stylesheet href="../../doc/docs.css"> |
|
|
|
<link rel="stylesheet" href="../../lib/codemirror.css"> |
|
<script src="../../lib/codemirror.js"></script> |
|
<script src="r.js"></script> |
|
<style> |
|
.CodeMirror { border-top: 1px solid silver; border-bottom: 1px solid silver; } |
|
.cm-s-default span.cm-semi { color: blue; font-weight: bold; } |
|
.cm-s-default span.cm-dollar { color: orange; font-weight: bold; } |
|
.cm-s-default span.cm-arrow { color: brown; } |
|
.cm-s-default span.cm-arg-is { color: brown; } |
|
</style> |
|
<div id=nav> |
|
<a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a> |
|
|
|
<ul> |
|
<li><a href="../../index.html">Home</a> |
|
<li><a href="../../doc/manual.html">Manual</a> |
|
<li><a href="https://github.com/codemirror/codemirror">Code</a> |
|
</ul> |
|
<ul> |
|
<li><a href="../index.html">Language modes</a> |
|
<li><a class=active href="#">R</a> |
|
</ul> |
|
</div> |
|
|
|
<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 * x |
|
cat(sprintf("Calling cube with 2 : %s\n", cube(2)) # will give 2^3 |
|
cat(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 frames |
|
df <- 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 <- 1 |
|
b <<- 2 |
|
c = 3 |
|
4 -> d |
|
5 ->> 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> |
|
|
|
</article>
|
|
|