Block_D_Part_7.tex

### {The R Programming Language}

The R Programming Language is a statistical , data analysis , etc

R is a free software environment for statistical computing and graphics.



<p>
### {Vector types}
texttt{R} operates on named data structures. The simplest such structure is the
vector, which is a single entity consisting of an ordered collection of
Numbers or characters.


Numeric vectors
Character vectors
Logical vectors
(also complex number vectors and colour vectors)


To create a vector, use the assignment operator and the concatenate function.
For numeric vectors, the values are simply numbers.

<code>
># week8.r
>NumVec<-c(10.4,5.6,3.1,6.4)
</code>

Alternatively we can use the texttt{assign()} command

For character vectors, the values are simply characters, specified with
quotation marks.A logical vectors is a vector whose elements are TRUE, FALSE or NA

<code>
>CharVec<-c(``blue", ``green", ``yellow")
>LogVec<-c(TRUE, FALSE)
</code>

<p>







<p>
#### {Set Theory Operations}

<p>
#### {Controlling Precision and Integerization}
<pre>
<code>
pi
round(pi,3)
round(pi,2)
floor(pi)
ceiling(pi)
</code>
</pre>
<p>

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<p>
### {Important Introductory Topics}
<p>
#### {The texttt{head()} and texttt{tail()} functions}