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Diffstat (limited to 'Master/texmf-dist/doc/metapost/base/source-tutorial/graph.tex')
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diff --git a/Master/texmf-dist/doc/metapost/base/source-tutorial/graph.tex b/Master/texmf-dist/doc/metapost/base/source-tutorial/graph.tex new file mode 100644 index 00000000000..b9d2e0503d4 --- /dev/null +++ b/Master/texmf-dist/doc/metapost/base/source-tutorial/graph.tex @@ -0,0 +1,52 @@ +\section{Graphing functions} +\label{sec:graphing} + +Among the most common types of figures for \TeX{} users are those which +are the graphs of functions of a single variable. Hobby recognized this +and constructed a package to accomplish this task. It is invoked by + +\begin{lstlisting}[style=MP] +input graph; +\end{lstlisting} + +\MP{} has the ability to construct data (i.e., ordered pairs) for +graphing simple functions. However, for more complicated functions, the +data should probably be constructed using external programs such as +\acro{MATLAB} (or Octave), Maple, Mathematica, Gnuplot, et. al. + +A typical data file, say \File{data.d}, to be used with the \File{graph} +package may have contents + +\vspace{8pt} +\noindent% +\begin{tabular}[b]{@{\hspace{48pt}}l@{}} + \lstinputlisting[style=text, boxpos=b]{data.d} +\end{tabular}% +\qquad% +\attach[subject={Graph data}]{data.d} +\vspace{8pt} + +This data represents the graph of $f(x)=\sqrt{x}$ for six equally spaced +points in $[0,1]$. To graph this data, the size of the graph must first +be decided. Choosing a width of $144\mathrm{\ bp}$ and a height of +$89\mathrm{\ bp}$, a minimally controlled plot (as in +\autoref{fig:data}) of this data can be generated by + +\begin{lstlisting}[style=MP] +draw begingraph(144bp,89bp); + gdraw "data.d"; +endgraph; +\end{lstlisting} + +The \File{graph} package provides many commands used to customize +generated graphs, and these commands are fully documented in the +manual~\cite{hobby:graph} for the \File{graph} package. + +\begin{figure} + \begin{withattachment}{data.mp} + \centering + \includegraphics{data.mps} + \end{withattachment} + \caption{$f(x)=\sqrt{x}$ using the \texttt{graph} package} + \label{fig:data} +\end{figure} |