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<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)}
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<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="http://ubalo.com/">Ubalo</a>, who hold
the <a href="LICENSE">license</a>.</p>
</article>