[OS X TeX] How to Insert Graphics Using TeXShop?

[Zachary Davis]

I've been having trouble inserting this .eps file into my TeX document.  
At the moment TeX is giving me an error that an \end control sequence is 
missing, which I can't seem to find.  The .eps file itself when it is 
embedded into the output file is off-center, and it is put between some 
text, in which it shouldn't.   My source file is as follows (excuse the 
length of this message):

\documentclass{article}
\usepackage{graphicx}
\setlength{\headsep}{0in}
\setlength{\evensidemargin}{-0.5in}
\setlength{\oddsidemargin}{-0.5in}
\setlenght{\textheight}{9.5in}
\setlength{\topmargin}{-0.5in}
\begin{document}
\centerline{\small University of Texas at Arlington}
\centerline{\small Aerospace Engineering Program}
\smallskip
\centerline{\Large AE 5327 Computational Aerodynamics}
\smallskip
\centerline{\Large \bf Two-Dimensional Euler Equations for Flow}
\centerline{\Large \bf Through a Supersonic Duct}
\medskip
\centerline{\normalsize by}
\smallskip
\centerline{ZACHARY S. DAVIS}
\bigskip
\bigskip

\section{Introduction}
In this assignment we are asked to write a computer program utilizing 
the MacCormack scheme to solve the two-dimensional Euler equations for 
flow through a supersonic duct.  The problem defines the cross-sectional 
area distribution as:
\medskip
\begin{equation}
A\left( x \right) = \frac{H_0}{L} \times \left(2 - \sin{3.14159 \times 
x}\right) \quad \mbox{for} \quad 0<x<1.
\end{equation}
\medskip
Both subsonic and supersonic inlet conditions were investigated, and for 
both studies several mesh resolutions $\left( N_x \times N_y \right)$ 
were utilized, where $N_x \hspace{0.1cm} \mbox{and} \hspace{0.1cm} N_y$ 
are the number of intervals in the $X \hspace{0.1cm}\mbox{and} 
\hspace{0.1cm} Y$ directions, respectively.  The computations were 
initialized using the solution to the isentropic  steady, 
quasi-one-dimensional case.  Additionally, the vertical velocity could 
either be initialized by taking into account the y-variation, or by 
setting it to zero.  Choosing either method to initialize the vertical 
velocity was a non-issue for the computations.  To compare the 
two-dimensional converged solution to the quasi-1D solution, and average 
of the desired result was taken as follows:
\medskip
\begin{equation}
\bar{U}^y_{i} = \frac{\sum \limits^{N_y+1}_{j=1} u\left( i,j \right) 
vol\left( i,j \right)}{\sum \limits^{N_y+1}_{j=1} vol\left( i,j \right)}.
\end{equation}
\medskip
In order to investigate the convergence of the solution, the quantity
\medskip
\begin{equation}
\frac{dU}{dt} = \frac{1}{2} \times \left( R^n + R^{n+\frac{1}{2}} 
\right),
\end{equation}
\medskip
where $R$ represents the balance of fluxes (RHS).

\section{Subsonic Case}
For the subsonic case, the upstream conditions p = 1.0 atm, T = 288K, 
and M = 0.1 and the downstream condition p = 1.0 atm, were chosen.  The 
duct aspect ratio $\frac{H_0}{L}$ was taken to be 0.10, and a mesh 
consisting of $N_x = 50$, $N_y = 16$, and CFL = 0.9 were also used for 
the investigation of this case.  The following is the convergence plot 
generated from computation:
\medskip
\begin{figure}
\includegraphics{pict1.eps}
\label{Figure 2.1}
\end{figure}
\end{document}

Am I using the includegraphics command correctly?  Your help is 
invaluable.

Thanks,

On Sunday, March 10, 2002, at 07:53 PM, Gary L. Gray wrote:

> On 3/10/02 8:48 PM, "Zachary Davis" <zsd3711 at gamma2.uta.edu> wrote:
>
>> I've never tried including a graph in one of my documents, and I'm
>> running into some trouble doing so using TeXShop.  I have created a 
>> plot
>> using gnuplot, and have converted the image to an .eps file using
>> GraphicConverter.  Then, I placed this .eps file in the same directory
>> as my LaTeX source file--the one which I want to include this graph.  I
>> have issued the command \includegraphics{filename.eps} in this source
>> file; however, I get an error in the console which says this control
>> sequence is undefined.  Is there something else I need to include in my
>> source file, or is the .eps file in the wrong directory?  Any help 
>> would
>> be appreciated.
>
> Have you loaded the graphicx package using \usepackage{graphicx} ???
>
> In addition, since you are using .eps files, be sure to typeset using 
> TeX +
> Ghostscript instead of pdftex.
>
> Good luck,
>
> -- Gary L. Gray
>
>
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========================================================
Zachary S. Davis
Department of Aerospace Engineering
University of Texas at Arlington
P.O. Box 19032
Arlington, TX 76019

Home:    (817) 272-6418            zsd3711 at gamma2.uta.edu
Office:    (817) 272-5269

          “Genius, that power that dazzles mortal eyes,
	  is oft but perseverance in disguise."

			--Henry Willard Austin
========================================================


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