mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-09-21 09:15:19 +00:00
96d4a3ecf7
Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
86 lines
2.5 KiB
HTML
86 lines
2.5 KiB
HTML
<!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"><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/marijnh/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 http://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>
|