<!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="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></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”> # Code from www.mayin.org/ajayshah/KB/R/

# FIRST LEARN ABOUT LISTS – X = list(height=5.4, weight=54) print(“Use default printing –”) print(X) print(“Accessing individual elements –”) cat(“Your height is ”, X$height, “ and your weight is ”, X$weight, “n”)

# FUNCTIONS – square <- function(x) {

return(x*x)

} cat(“The square of 3 is ”, square(3), “n”)

# default value of the arg is set to 5.

cube <- function(x=5) {

return(x*x*x);

} cat(“Calling cube with 2 : ”, cube(2), “n”) # will give 2^3 cat(“Calling cube : ”, cube(), “n”) # will default to 5^3.

# LEARN ABOUT FUNCTIONS THAT RETURN MULTIPLE OBJECTS – powers <- function(x) {

parcel = list(x2=x*x, x3=x*x*x, x4=x*x*x*x);
return(parcel);

}

X = powers(3); print(“Showing powers of 3 –”); print(X);

# WRITING THIS COMPACTLY (4 lines instead of 7)

powerful <- function(x) {

return(list(x2=x*x, x3=x*x*x, x4=x*x*x*x));

} print(“Showing powers of 3 –”); print(powerful(3));

# In R, the last expression in a function is, by default, what is # returned. So you could equally just say: powerful <- function(x) {list(x2=x*x, x3=x*x*x, x4=x*x*x*x)} </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>