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\title{A \emph{brew} Test File}
\author{\emph{Jeffrey Horner}}
\usepackage{a4wide,graphicx}
\begin{document}
\maketitle
A simple example that will run in any \emph{R} engine \emph{(brew may work with S, but this is untested)}: The integers from 1 to
10 are
\begin{verbatim}
1 2 3 4 5 6 7 8 9 10
\end{verbatim}
We can also emulate a simple calculator \emph{(although the syntax is not as elegant as Sweave)}:
\begin{verbatim}
> 1+1
[1] 2
> 1+pi
[1] 4.141593
> 1+pi
[1] 4.141593
> sin(pi/2)
[1] 1
\end{verbatim}
Now we look at Gaussian data:
\begin{verbatim}
[1] 0.4850072 0.5299571 -0.1913293 -1.4806540 0.3611630 0.6089846
[7] -0.6045145 -1.5165037 0.3995648 -0.7620245 -0.2342828 0.0914568
[13] -0.6350603 1.4255549 1.4350150 -2.0392190 0.8070093 1.5085753
[19] 0.9188515 1.4485650
One Sample t-test
data: x
t = 0.5448, df = 19, p-value = 0.5922
alternative hypothesis: true mean is not equal to 0
95 percent confidence interval:
-0.3631849 0.6187965
sample estimates:
mean of x
0.1278058
\end{verbatim}
Note that we can easily integrate some numbers into standard text: The
third element of vector \texttt{x} is -0.1913293, the
$p$-value of the test is 0.59222. % $
Now we look at a summary of the famous iris data set, and we want to
see the commands in the code chunks \emph{(brew can't show you the code, so
don't try to find them)}:
\begin{verbatim}
Sepal.Length Sepal.Width Petal.Length Petal.Width
Min. :4.300 Min. :2.000 Min. :1.000 Min. :0.100
1st Qu.:5.100 1st Qu.:2.800 1st Qu.:1.600 1st Qu.:0.300
Median :5.800 Median :3.000 Median :4.350 Median :1.300
Mean :5.843 Mean :3.057 Mean :3.758 Mean :1.199
3rd Qu.:6.400 3rd Qu.:3.300 3rd Qu.:5.100 3rd Qu.:1.800
Max. :7.900 Max. :4.400 Max. :6.900 Max. :2.500
Species
setosa :50
versicolor:50
virginica :50
\end{verbatim}
\begin{figure}[htbp]
\begin{center}
\includegraphics{brew-test-1-1}
\caption{Pairs plot of the iris data.}
\end{center}
\end{figure}
\begin{figure}[htbp]
\begin{center}
\includegraphics{brew-test-1-2}
\caption{Boxplot of sepal length grouped by species.}
\end{center}
\end{figure}
\end{document}
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