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| 1 | <!doctype html> | ||
| 2 | <html> | ||
| 3 | <head> | ||
| 4 | <title>CodeMirror: R mode</title> | ||
| 5 | <link rel="stylesheet" href="../../lib/codemirror.css"> | ||
| 6 | <script src="../../lib/codemirror.js"></script> | ||
| 7 | <script src="r.js"></script> | ||
| 8 | <style> | ||
| 9 | .CodeMirror { border-top: 1px solid silver; border-bottom: 1px solid silver; } | ||
| 10 | .cm-s-default span.cm-semi { color: blue; font-weight: bold; } | ||
| 11 | .cm-s-default span.cm-dollar { color: orange; font-weight: bold; } | ||
| 12 | .cm-s-default span.cm-arrow { color: brown; } | ||
| 13 | .cm-s-default span.cm-arg-is { color: brown; } | ||
| 14 | </style> | ||
| 15 | <link rel="stylesheet" href="../../doc/docs.css"> | ||
| 16 | </head> | ||
| 17 | <body> | ||
| 18 | <h1>CodeMirror: R mode</h1> | ||
| 19 | <form><textarea id="code" name="code"> | ||
| 20 | # Code from http://www.mayin.org/ajayshah/KB/R/ | ||
| 21 | |||
| 22 | # FIRST LEARN ABOUT LISTS -- | ||
| 23 | X = list(height=5.4, weight=54) | ||
| 24 | print("Use default printing --") | ||
| 25 | print(X) | ||
| 26 | print("Accessing individual elements --") | ||
| 27 | cat("Your height is ", X$height, " and your weight is ", X$weight, "\n") | ||
| 28 | |||
| 29 | # FUNCTIONS -- | ||
| 30 | square <- function(x) { | ||
| 31 | return(x*x) | ||
| 32 | } | ||
| 33 | cat("The square of 3 is ", square(3), "\n") | ||
| 34 | |||
| 35 | # default value of the arg is set to 5. | ||
| 36 | cube <- function(x=5) { | ||
| 37 | return(x*x*x); | ||
| 38 | } | ||
| 39 | cat("Calling cube with 2 : ", cube(2), "\n") # will give 2^3 | ||
| 40 | cat("Calling cube : ", cube(), "\n") # will default to 5^3. | ||
| 41 | |||
| 42 | # LEARN ABOUT FUNCTIONS THAT RETURN MULTIPLE OBJECTS -- | ||
| 43 | powers <- function(x) { | ||
| 44 | parcel = list(x2=x*x, x3=x*x*x, x4=x*x*x*x); | ||
| 45 | return(parcel); | ||
| 46 | } | ||
| 47 | |||
| 48 | X = powers(3); | ||
| 49 | print("Showing powers of 3 --"); print(X); | ||
| 50 | |||
| 51 | # WRITING THIS COMPACTLY (4 lines instead of 7) | ||
| 52 | |||
| 53 | powerful <- function(x) { | ||
| 54 | return(list(x2=x*x, x3=x*x*x, x4=x*x*x*x)); | ||
| 55 | } | ||
| 56 | print("Showing powers of 3 --"); print(powerful(3)); | ||
| 57 | |||
| 58 | # In R, the last expression in a function is, by default, what is | ||
| 59 | # returned. So you could equally just say: | ||
| 60 | powerful <- function(x) {list(x2=x*x, x3=x*x*x, x4=x*x*x*x)} | ||
| 61 | </textarea></form> | ||
| 62 | <script> | ||
| 63 | var editor = CodeMirror.fromTextArea(document.getElementById("code"), {}); | ||
| 64 | </script> | ||
| 65 | |||
| 66 | <p><strong>MIME types defined:</strong> <code>text/x-rsrc</code>.</p> | ||
| 67 | |||
| 68 | <p>Development of the CodeMirror R mode was kindly sponsored | ||
| 69 | by <a href="http://ubalo.com/">Ubalo</a>, who hold | ||
| 70 | the <a href="LICENSE">license</a>.</p> | ||
| 71 | |||
| 72 | </body> | ||
| 73 | </html> | ||