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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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1 <!doctype html>
2
3 <title>CodeMirror: R mode</title>
4 <meta charset="utf-8"/>
5 <link rel=stylesheet href="../../doc/docs.css">
6
7 <link rel="stylesheet" href="../../lib/codemirror.css">
8 <script src="../../lib/codemirror.js"></script>
9 <script src="r.js"></script>
10 <style>
11 .CodeMirror { border-top: 1px solid silver; border-bottom: 1px solid silver; }
12 .cm-s-default span.cm-semi { color: blue; font-weight: bold; }
13 .cm-s-default span.cm-dollar { color: orange; font-weight: bold; }
14 .cm-s-default span.cm-arrow { color: brown; }
15 .cm-s-default span.cm-arg-is { color: brown; }
16 </style>
17 <div id=nav>
18 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
19
20 <ul>
21 <li><a href="../../index.html">Home</a>
22 <li><a href="../../doc/manual.html">Manual</a>
23 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
24 </ul>
25 <ul>
26 <li><a href="../index.html">Language modes</a>
27 <li><a class=active href="#">R</a>
28 </ul>
29 </div>
30
31 <article>
32 <h2>R mode</h2>
33 <form><textarea id="code" name="code">
34 X <- list(height = 5.4, weight = 54)
35 cat("Printing objects: "); print(X)
36 print("Accessing individual elements:")
37 cat(sprintf("Your height is %s and your weight is %s\n", X$height, X$weight))
38
39 # Functions:
40 square <- function(x) {
41 return(x * x)
42 }
43 cat(sprintf("The square of 3 is %s\n", square(3)))
44
45 # In R, the last expression in a function is, by default, what is
46 # returned. The idiomatic way to write the function is:
47 square <- function(x) {
48 x * x
49 }
50 # or, for functions with short content:
51 square <- function(x) x * x
52
53 # Function arguments with default values:
54 cube <- function(x = 5) x * x * x
55 cat(sprintf("Calling cube with 2 : %s\n", cube(2)) # will give 2^3
56 cat(sprintf("Calling cube : %s\n", cube()) # will default to 5^3.
57
58 powers <- function(x) list(x2 = x*x, x3 = x*x*x, x4 = x*x*x*x)
59
60 cat("Powers of 3: "); print(powers(3))
61
62 # Data frames
63 df <- data.frame(letters = letters[1:5], '#letter' = 1:5)
64 print(df$letters)
65 print(df$`#letter`)
66
67 # Operators:
68 m1 <- matrix(1:6, 2, 3)
69 m2 <- m1 %*% t(m1)
70 cat("Matrix product: "); print(m2)
71
72 # Assignments:
73 a <- 1
74 b <<- 2
75 c = 3
76 4 -> d
77 5 ->> e
78 </textarea></form>
79 <script>
80 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {});
81 </script>
82
83 <p><strong>MIME types defined:</strong> <code>text/x-rsrc</code>.</p>
84
85 <p>Development of the CodeMirror R mode was kindly sponsored
86 by <a href="https://twitter.com/ubalo">Ubalo</a>.</p>
87
88 </article>