presentations/basic-plot.tex
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     1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
     2 %Tutorial slides on Python.
       
     3 %
       
     4 % Author: FOSSEE 
       
     5 % Copyright (c) 2009, FOSSEE, IIT Bombay
       
     6 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
     7 
       
     8 \documentclass[14pt,compress]{beamer}
       
     9 %\documentclass[draft]{beamer}
       
    10 %\documentclass[compress,handout]{beamer}
       
    11 %\usepackage{pgfpages} 
       
    12 %\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
       
    13 
       
    14 % Modified from: generic-ornate-15min-45min.de.tex
       
    15 \mode<presentation>
       
    16 {
       
    17   \usetheme{Warsaw}
       
    18   \useoutertheme{infolines}
       
    19   \setbeamercovered{transparent}
       
    20 }
       
    21 
       
    22 \usepackage[english]{babel}
       
    23 \usepackage[latin1]{inputenc}
       
    24 %\usepackage{times}
       
    25 \usepackage[T1]{fontenc}
       
    26 
       
    27 % Taken from Fernando's slides.
       
    28 \usepackage{ae,aecompl}
       
    29 \usepackage{mathpazo,courier,euler}
       
    30 \usepackage[scaled=.95]{helvet}
       
    31 
       
    32 \definecolor{darkgreen}{rgb}{0,0.5,0}
       
    33 
       
    34 \usepackage{listings}
       
    35 \lstset{language=Python,
       
    36     basicstyle=\ttfamily\bfseries,
       
    37     commentstyle=\color{red}\itshape,
       
    38   stringstyle=\color{darkgreen},
       
    39   showstringspaces=false,
       
    40   keywordstyle=\color{blue}\bfseries}
       
    41 
       
    42 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    43 % Macros
       
    44 \setbeamercolor{emphbar}{bg=blue!20, fg=black}
       
    45 \newcommand{\emphbar}[1]
       
    46 {\begin{beamercolorbox}[rounded=true]{emphbar} 
       
    47       {#1}
       
    48  \end{beamercolorbox}
       
    49 }
       
    50 \newcounter{time}
       
    51 \setcounter{time}{0}
       
    52 \newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
       
    53 
       
    54 \newcommand{\typ}[1]{\lstinline{#1}}
       
    55 
       
    56 \newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
       
    57 
       
    58 %%% This is from Fernando's setup.
       
    59 % \usepackage{color}
       
    60 % \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
       
    61 % % Use and configure listings package for nicely formatted code
       
    62 % \usepackage{listings}
       
    63 % \lstset{
       
    64 %    language=Python,
       
    65 %    basicstyle=\small\ttfamily,
       
    66 %    commentstyle=\ttfamily\color{blue},
       
    67 %    stringstyle=\ttfamily\color{orange},
       
    68 %    showstringspaces=false,
       
    69 %    breaklines=true,
       
    70 %    postbreak = \space\dots
       
    71 % }
       
    72 
       
    73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    74 % Title page
       
    75 \title[Basic Plotting]{Python for Scientific Computing : Basic Plotting}
       
    76 
       
    77 \author[FOSSEE] {FOSSEE}
       
    78 
       
    79 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
       
    80 \date{}
       
    81 %% \date[] {7 November, 2009\\Day 1, Session 1}
       
    82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    83 
       
    84 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
       
    85 %\logo{\pgfuseimage{iitmlogo}}
       
    86 
       
    87 
       
    88 %% Delete this, if you do not want the table of contents to pop up at
       
    89 %% the beginning of each subsection:
       
    90 %% \AtBeginSubsection[]
       
    91 %% {
       
    92 %%   \begin{frame}<beamer>
       
    93 %%     \frametitle{Outline}
       
    94 %%     \tableofcontents[currentsection,currentsubsection]
       
    95 %%   \end{frame}
       
    96 %% }
       
    97 
       
    98 %% \AtBeginSection[]
       
    99 %% {
       
   100 %%   \begin{frame}<beamer>
       
   101 %%     \frametitle{Outline}
       
   102 %%     \tableofcontents[currentsection,currentsubsection]
       
   103 %%   \end{frame}
       
   104 %% }
       
   105 
       
   106 % If you wish to uncover everything in a step-wise fashion, uncomment
       
   107 % the following command: 
       
   108 %\beamerdefaultoverlayspecification{<+->}
       
   109 
       
   110 %%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
       
   111 
       
   112 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
   113 % DOCUMENT STARTS
       
   114 \begin{document}
       
   115 
       
   116 \begin{frame}
       
   117   \maketitle
       
   118 \end{frame}
       
   119 
       
   120 %% \begin{frame}
       
   121 %%   \frametitle{Outline}
       
   122 %%   \tableofcontents
       
   123 %%   % You might wish to add the option [pausesections]
       
   124 %% \end{frame}
       
   125 
       
   126 %% \begin{frame}
       
   127 %%   \frametitle{Workshop Schedule: Day 1}
       
   128 %%   \begin{description}
       
   129 %% 	\item[Session 1] Sat 09:00--10:00
       
   130 %% 	\item[Session 2] Sat 10:05--11:05
       
   131 %% 	\item[Session 3] Sat 11:20--12:20
       
   132 %% 	\item[Session 4] Sat 12:25--13:25
       
   133 %%         \item[Quiz 1] Sat 14:25--14:40
       
   134 %%         \item[Session 5] Sat 14:40--15:25
       
   135 %%         \item[Session 6] Sat 15:40--16:40
       
   136 %%         \item[Quiz 2] Sat 16:45--17:00
       
   137 %%   \end{description}
       
   138 %% \end{frame}
       
   139 
       
   140 %% \begin{frame}
       
   141 %%   \frametitle{Workshop Schedule: Day 2}
       
   142 %%   \begin{description}
       
   143 %% 	\item[Session 1] Sun 09:00--10:00
       
   144 %% 	\item[Session 2] Sun 10:05--11:05
       
   145 %% 	\item[Session 3] Sun 11:20--12:20
       
   146 %% 	\item[Session 4] Sun 12:25--13:25
       
   147 %%         \item[Quiz 1] Sun 14:25--14:40
       
   148 %%         \item[Session 5] Sun 14:40--15:25
       
   149 %%         \item[Session 6] Sun 15:40--16:40
       
   150 %%         \item[Quiz 2] Sun 16:45--17:00
       
   151 %%   \end{description}
       
   152 %% \end{frame}
       
   153 
       
   154 \begin{frame}
       
   155   \frametitle{About the Workshop}
       
   156   \begin{block}{Intended Audience}
       
   157   \begin{itemize}
       
   158        \item Engg., Mathematics and Science teachers.
       
   159        \item Interested students from similar streams.
       
   160   \end{itemize}
       
   161   \end{block}  
       
   162 
       
   163   \begin{block}{Goal: Successful participants will be able to}
       
   164     \begin{itemize}
       
   165       \item Use Python as a basic Plotting tool.
       
   166       \item Understand how to use Python as a scripting and problem solving language.
       
   167 
       
   168     \end{itemize}
       
   169   \end{block}
       
   170 \end{frame}
       
   171 
       
   172 \section{Getting started}
       
   173 \begin{frame}
       
   174 \frametitle{Checklist}
       
   175    \begin{itemize}
       
   176     \item IPython
       
   177     \item Pylab
       
   178     %% \item Editor: We recommend scite.
       
   179     %% \item Data files: 
       
   180     %%   \begin{itemize}
       
   181     %%   \item \typ{sslc1.txt}
       
   182     %%   \item \typ{pendulum.txt}
       
   183     %%   \item \typ{points.txt}
       
   184     %%   \item \typ{pos.txt}
       
   185     %%   \end{itemize}
       
   186     %% \item Python scripts: 
       
   187     %%   \begin{itemize}
       
   188     %%   \item \typ{sslc_allreg.py}
       
   189     %%   \item \typ{sslc_science.py}
       
   190     %%   \end{itemize}
       
   191     %% \item Images
       
   192     %%   \begin{itemize}
       
   193     %%   \item \typ{lena.png}
       
   194     %%   \item \typ{smoothing.gif}
       
   195   \end{itemize}
       
   196   %% \end{enumerate}
       
   197 \end{frame}
       
   198 
       
   199 \begin{frame}[fragile]
       
   200 \frametitle{Starting up \ldots}
       
   201 \begin{block}{}
       
   202 \begin{verbatim}
       
   203   $ ipython -pylab  
       
   204 \end{verbatim}
       
   205 \end{block}
       
   206 \begin{lstlisting}     
       
   207   In []: print "Hello, World!"
       
   208   Hello, World!
       
   209 \end{lstlisting}
       
   210 Exiting
       
   211 \begin{lstlisting}     
       
   212   In []: ^D(Ctrl-D)
       
   213   Do you really want to exit([y]/n)? y
       
   214 \end{lstlisting}
       
   215 \end{frame}
       
   216 
       
   217 %% \begin{frame}[fragile]
       
   218 %% \frametitle{Loops}
       
   219 %% Breaking out of loops
       
   220 %% \begin{lstlisting}     
       
   221 %%   In []: while True:
       
   222 %%     ...:     print "Hello, World!"
       
   223 %%     ...:     
       
   224 %%   Hello, World!
       
   225 %%   Hello, World!^C(Ctrl-C)
       
   226 %%   ------------------------------------
       
   227 %%   KeyboardInterrupt                   
       
   228 
       
   229 %% \end{lstlisting}
       
   230 %% \end{frame}
       
   231 
       
   232 \section{Plotting}
       
   233 
       
   234 \subsection{Drawing plots}
       
   235 \begin{frame}[fragile]
       
   236 \frametitle{First Plot}
       
   237 \begin{columns}
       
   238     \column{0.20\textwidth}
       
   239     \hspace*{-0.12in}
       
   240   \includegraphics[height=1.2in, interpolate=true]{data/firstplot}
       
   241     \column{0.7\textwidth}
       
   242     \begin{block}{}
       
   243     \begin{small}
       
   244 \begin{lstlisting}
       
   245 In []: x=lins<tab>
       
   246 In []: x=linspace(
       
   247  ... : (Ctrl-C)
       
   248 In []: x = linspace(0, 2*pi, 50)
       
   249 In []: plot(x, sin(x))
       
   250 \end{lstlisting}
       
   251     \end{small}
       
   252     \end{block}
       
   253  \begin{block}{Ipython Feature}
       
   254     \begin{itemize}
       
   255       \item Use Tab for auto-suggestions.
       
   256       \item In []: (Ctrl-C) to get back In[] prompt from ...
       
   257   \end{itemize}
       
   258   \end{block}
       
   259 \end{columns}
       
   260 \end{frame}
       
   261 
       
   262 
       
   263 \begin{frame}[fragile]
       
   264 \frametitle{Function Documentation}
       
   265 \begin {block}{}
       
   266 \begin{lstlisting}
       
   267 In []: linspace?
       
   268 \end{lstlisting}
       
   269 \end{block}
       
   270 \begin{block}{Ipython Feature}
       
   271     \begin{itemize}
       
   272       \item linspace? , ? mark after a function shows its documentation
       
   273       \item q to exit help  
       
   274   \end{itemize}
       
   275   \end{block}
       
   276 \end{frame}
       
   277 
       
   278 
       
   279 \begin{frame}[fragile]
       
   280 \frametitle{Walkthrough}
       
   281 \begin{block}{\typ{x = linspace(start, stop, num)} }
       
   282 returns \typ{num} evenly spaced points, in the interval [\typ{start}, \typ{stop}].
       
   283 \end{block}
       
   284 \begin{lstlisting}
       
   285 x[0] = start
       
   286 x[num - 1] = end
       
   287 \end{lstlisting}
       
   288 \vspace*{.35in}
       
   289 \begin{block}{\typ{plot(x, y)}}
       
   290 plots \typ{x} and \typ{y} using default line style and color
       
   291 \end{block}
       
   292 %\inctime{10}
       
   293 \end{frame}
       
   294 
       
   295 \subsection{Decoration}
       
   296 \begin{frame}[fragile]
       
   297 \frametitle{Adding Labels and title}
       
   298 \begin{columns}
       
   299   \column{0.25\textwidth}
       
   300   \hspace*{-0.45in}
       
   301   \includegraphics[height=2in, interpolate=true]{data/label}  
       
   302   \hspace*{0.5in}
       
   303   \column{0.55\textwidth}
       
   304   \begin{block}{}
       
   305   \small
       
   306   \begin{lstlisting}
       
   307 In []: xlabel('x')
       
   308 In []: ylabel('sin(x)')
       
   309 In []: title('Sinusoids')
       
   310 
       
   311   \end{lstlisting}
       
   312   \small
       
   313 %  \end{lstlisting}
       
   314 %\typ{xlabel(s)} sets the label of the \typ{x}-axis to \typ{s}
       
   315 
       
   316 %  \begin{lstlisting}
       
   317   \end{block}
       
   318 %\typ{ylabel(s)} sets the label of the \typ{y}-axis to \typ{s}
       
   319 \end{columns}
       
   320 \end{frame}
       
   321 
       
   322 %% \begin{frame}[fragile]
       
   323 %% \frametitle{Another example}
       
   324 %%   \begin{lstlisting}
       
   325 %% In []: clf()
       
   326 %%   \end{lstlisting}
       
   327 %% \emphbar{Clears the plot area.}
       
   328 %%   \begin{lstlisting}
       
   329 %% In []: y = linspace(0, 2*pi, 50)
       
   330 %% In []: plot(y, sin(2*y))
       
   331 %% In []: xlabel('y')
       
   332 %% In []: ylabel('sin(2y)')
       
   333 %%   \end{lstlisting}
       
   334 %% \end{frame}
       
   335 
       
   336 \subsection{More decoration}
       
   337 \begin{frame}[fragile]
       
   338 \frametitle{ Legends}
       
   339 \vspace*{-0.15in}
       
   340 %  \begin{block}{}
       
   341 %  \small
       
   342 \begin{lstlisting}
       
   343 In []: legend(['sin(x)'])
       
   344 \end{lstlisting}
       
   345 %  \small
       
   346 %  \end{block}
       
   347   \vspace*{-0.1in}
       
   348   \begin{center}
       
   349   \includegraphics[height=2in, interpolate=true]{data/legend}  
       
   350   \end{center}
       
   351 \end{frame}
       
   352 
       
   353 \begin{frame}[fragile]
       
   354 \frametitle{Legend Placement}
       
   355 \begin{block}{}
       
   356     \small
       
   357 \begin{lstlisting}
       
   358 In []: legend(['sin(x)'], loc = 'center')
       
   359 \end{lstlisting}
       
   360 \end{block}
       
   361 
       
   362 \begin{columns}
       
   363     \column{0.6\textwidth}
       
   364  \includegraphics[height=1.5in, interpolate=true]{data/position}  
       
   365 \column{0.35\textwidth}
       
   366 \vspace{-0.15in}
       
   367 \begin{lstlisting}
       
   368 'best' 
       
   369 'right'
       
   370 'center'
       
   371 \end{lstlisting}
       
   372 \end{columns}
       
   373 \begin{block}{Ipython Feature}
       
   374     \begin{itemize}
       
   375       \item Use up arrow and down arrow to get old commands .
       
   376   \end{itemize}
       
   377   \end{block}
       
   378 
       
   379 \end{frame}
       
   380 
       
   381 
       
   382 
       
   383 \begin{frame}[fragile]
       
   384 \frametitle{Annotate a point }
       
   385 
       
   386 \begin{lstlisting}
       
   387 In []:annotate('origin', xy = (0, 0))
       
   388 \end{lstlisting}
       
   389 
       
   390 
       
   391 \begin{columns}
       
   392     \column{0.6\textwidth}
       
   393  \includegraphics[height=2in, interpolate=true]{data/annotate}  
       
   394 \column{0.45\textwidth}
       
   395 \vspace{-0.2in}
       
   396 %% \begin{lstlisting}
       
   397 %% 'best' 
       
   398 %% 'right'
       
   399 %% 'center'
       
   400 %% \end{lstlisting}
       
   401 \end{columns}
       
   402 \end{frame}
       
   403 
       
   404 
       
   405 
       
   406 %% \begin{frame}[fragile]
       
   407 %%   \frametitle{For arbitrary location}
       
   408 %% \vspace*{-0.1in}
       
   409 %% \begin{lstlisting}
       
   410 %% In []: legend(['sin(2y)'], loc=(.8,.1)) 
       
   411 %% \end{lstlisting}
       
   412 %% \emphbar{Specify south-east corner position}
       
   413 %% %\vspace*{-0.2in}
       
   414 %% \begin{center}
       
   415 %%   \includegraphics[height=2in, interpolate=true]{data/loc}  
       
   416 %% \end{center}
       
   417 %% %\inctime{10}
       
   418 %% \end{frame}
       
   419 
       
   420 \begin{frame}[fragile]
       
   421 \frametitle{Saving \& Closing}
       
   422 \begin{lstlisting}
       
   423 In []: savefig('sin.png')
       
   424 
       
   425 \end{lstlisting}
       
   426 \end{frame}
       
   427 %%   \begin{lstlisting}
       
   428 %% In []: clf()
       
   429 %%   \end{lstlisting}
       
   430 %% \emphbar{Clears the plot area.}
       
   431 %%   \begin{lstlisting}
       
   432 %% In []: y = linspace(0, 2*pi, 50)
       
   433 %% In []: plot(y, sin(2*y))
       
   434 %% In []: xlabel('y')
       
   435 %% In []: ylabel('sin(2y)')
       
   436 %%   \end{lstlisting}
       
   437 %% \end{frame}
       
   438 
       
   439 
       
   440 
       
   441 
       
   442 
       
   443 
       
   444 \section{Multiple plots}
       
   445 \begin{frame}[fragile]
       
   446 \frametitle{Overlaid Plots}
       
   447 \begin{lstlisting}
       
   448 In []: plot(x, cos(x))
       
   449 In []: xlabel('x')
       
   450 In []: ylabel('f(x)')
       
   451 In []: legend(['sin(x)', 'cos(x)']) 
       
   452 In []: clf()
       
   453 \end{lstlisting}
       
   454 \emphbar{By default plots would be overlaid!}
       
   455 \end{frame}
       
   456 
       
   457 \begin{frame}[fragile]
       
   458 \frametitle{Plotting separate figures}
       
   459 \begin{lstlisting}
       
   460 In []: figure(1)
       
   461 In []: plot(x, sin(x))
       
   462 In []: figure(2)
       
   463 In []: plot(x, cos(x))
       
   464 In []: figure(1)
       
   465 In []: title('sin(x)')
       
   466 In []: close()
       
   467 In []: close()
       
   468 \end{lstlisting}
       
   469 \end{frame}
       
   470 
       
   471 \begin{frame}[fragile]
       
   472 \frametitle{Showing it better}
       
   473 \vspace{-0.15in}
       
   474 \begin{lstlisting}
       
   475 In []: plot(x, sin(x), 'g' ,linewidth=2)
       
   476 
       
   477 In []: clf()
       
   478 
       
   479 \end{lstlisting}
       
   480 \vspace*{-0.2in}
       
   481 \begin{center}
       
   482   \includegraphics[height=2.2in, interpolate=true]{data/green}  
       
   483 \end{center}
       
   484 %\inctime{10}
       
   485 \end{frame}
       
   486 
       
   487 
       
   488 \begin{frame}[fragile]
       
   489 \frametitle{Showing it better , Using Dots }
       
   490 \vspace{-0.15in}
       
   491 \begin{lstlisting}
       
   492 In []: plot(x, sin(x), '.')
       
   493 
       
   494 In []: clf()
       
   495 
       
   496 \end{lstlisting}
       
   497 \vspace*{-0.2in}
       
   498 \begin{center}
       
   499   \includegraphics[height=2.2in, interpolate=true]{data/dash}  
       
   500 \end{center}
       
   501 %\inctime{10}
       
   502 \end{frame}
       
   503 
       
   504 
       
   505 
       
   506 
       
   507 
       
   508 %% \begin{frame}[fragile]
       
   509 %% \frametitle{Review Ipython }
       
   510 %% \vspace{-0.15in}
       
   511 %% \begin{lstlisting}
       
   512 %% In []: lins<tab>
       
   513 
       
   514 %% In []: function?
       
   515 %%      :q 
       
   516 %% (Ctrl-D)
       
   517 %% In []: ^C(Ctrl-C)
       
   518 
       
   519 
       
   520 
       
   521 %% \end{lstlisting}
       
   522 %% %\inctime{10}
       
   523 %% \end{frame}
       
   524 
       
   525 
       
   526 \begin{frame}[fragile]
       
   527 \frametitle{Review Ipython Features }
       
   528 \vspace{-0.1in}
       
   529 \begin{itemize}
       
   530 \item Entering Ipython.
       
   531 \begin{verbatim}
       
   532   $ ipython -pylab  
       
   533 \end{verbatim}
       
   534 \item Seeing the documentation . 
       
   535 \begin{lstlisting}
       
   536 In []: linspace?
       
   537 \end{lstlisting}
       
   538 \item Quitting the documentation .
       
   539 \begin{lstlisting}
       
   540 :q 
       
   541 \end{lstlisting}
       
   542 \item Quitting from the ... prompt.
       
   543 \begin{lstlisting}
       
   544 Ctrl-C
       
   545 \end{lstlisting}
       
   546 \end{itemize}
       
   547 \begin{itemize}
       
   548 \item Quitting Ipython
       
   549 \begin{lstlisting}
       
   550 Ctrl-D
       
   551 \end{lstlisting}
       
   552 \end{itemize}
       
   553 
       
   554 
       
   555 %\inctime{10}
       
   556 \end{frame}
       
   557 
       
   558 \begin{frame}[fragile]
       
   559 \frametitle{Review Plotting }
       
   560 \vspace{-0.15in}
       
   561 \begin{itemize}
       
   562 \item Outputting things.
       
   563 \end{itemize}
       
   564 \begin{lstlisting}
       
   565 In []: print ''hello world'' 
       
   566 \end{lstlisting}
       
   567 \begin{itemize}
       
   568 \item Create equally spaced points.
       
   569 \end{itemize}
       
   570 \begin{lstlisting}
       
   571 In []: x=linspace(0,2*pi,50)
       
   572 \end{lstlisting}
       
   573 \begin{itemize}
       
   574 \item Simple Plotting
       
   575 \end{itemize}
       
   576 \begin{lstlisting}
       
   577 In []: plot(x,sin(x),'.',linewidth=2)
       
   578 \end{lstlisting}
       
   579 \end{frame}
       
   580 
       
   581 
       
   582 \begin{frame}[fragile]
       
   583 \frametitle{Review Plotting }
       
   584 \vspace{-0.1in}
       
   585 \begin{itemize}
       
   586 \item   label axis
       
   587 \end{itemize}
       
   588 \begin{lstlisting}
       
   589 In []: xlabel('x')
       
   590 \end{lstlisting}
       
   591 \begin{itemize}
       
   592 \item Title The plot  
       
   593 \end{itemize}
       
   594 \begin{lstlisting}
       
   595 In []: title('sinusoid')
       
   596 \end{lstlisting}
       
   597 \begin{itemize}
       
   598 \item Place legend at a proper place
       
   599 \end{itemize}
       
   600 \begin{lstlisting}
       
   601 In []: legend(['sin(x)'])
       
   602 \end{lstlisting}
       
   603 \begin{itemize}
       
   604 \item Annotate the plot
       
   605 \end{itemize}
       
   606 \begin{lstlisting}
       
   607 In []:annotate('origin' , xy=(0,0)) 
       
   608 \end{lstlisting}
       
   609 %\inctime{10}
       
   610 \end{frame}
       
   611 
       
   612 
       
   613 
       
   614 
       
   615 \begin{frame}[fragile]
       
   616 \frametitle{Review Plotting }
       
   617 \vspace{-0.15in}
       
   618 \begin{itemize}
       
   619 \item Save a plot
       
   620 \end{itemize}
       
   621 \begin{lstlisting}
       
   622 In []:savefig('sine.png')
       
   623 \end{lstlisting}
       
   624 \begin{itemize}
       
   625 \item Managing multiple plots using figure
       
   626 \end{itemize}
       
   627 \begin{lstlisting}
       
   628 In []:figure(1)
       
   629 \end{lstlisting}
       
   630 \begin{itemize}
       
   631 \item Clearing plot 
       
   632 \end{itemize}
       
   633 \begin{lstlisting}
       
   634 In []: clf()
       
   635 \end{lstlisting}
       
   636 \begin{itemize}
       
   637 \item Closing plot 
       
   638 \end{itemize}
       
   639 \begin{lstlisting}
       
   640 In []: close()
       
   641 \end{lstlisting}
       
   642 
       
   643 %\inctime{10}
       
   644 \end{frame}
       
   645 
       
   646 
       
   647 
       
   648 
       
   649 
       
   650 
       
   651 
       
   652 %% \begin{frame}[fragile]
       
   653 %% \frametitle{Review  , Function and Commands }
       
   654 %% \vspace{-0.15in}
       
   655 %% \begin{lstlisting}
       
   656 
       
   657 %% In []: print 'hello world'
       
   658 %% In []: x=linspace(0,2*pi,50)
       
   659 %% In []: plot(x, sin(x), 'g',linewidth=2)
       
   660 %% In []: xlabel('x')
       
   661 %% In []: ylabel('sin(x)')
       
   662 %% In []: title('sinusoid')
       
   663 %% In []: legend(['sin(x)','cos(x)'])
       
   664 %% In []: annotate('origin', xy=(0,0))
       
   665 %% In []: savefig('sine.png')
       
   666 %% In []: clf()
       
   667 %% In []: figure(1)
       
   668 %% \end{lstlisting}
       
   669 %% %\inctime{10}
       
   670 %% \end{frame}
       
   671 
       
   672 
       
   673 
       
   674 %% \begin{frame}[fragile]
       
   675 %% \frametitle{Annotating}
       
   676 %% \vspace*{-0.15in}
       
   677 %% \begin{lstlisting}
       
   678 %% In []: annotate('local max', xy=(1.5, 1))
       
   679 %% \end{lstlisting}
       
   680 %% \vspace*{-0.2in}
       
   681 %% \begin{center}
       
   682 %%   \includegraphics[height=2in, interpolate=true]{data/annotate}  
       
   683 %% \end{center}
       
   684 %% \end{frame}
       
   685 
       
   686 %% \begin{frame}[fragile]
       
   687 %% \frametitle{Axes lengths}
       
   688 %% \emphbar{Get the axes limits}
       
   689 %%   \begin{lstlisting}
       
   690 %% In []: xmin, xmax = xlim() 
       
   691 %% In []: ymin, ymax = ylim() 
       
   692 %%   \end{lstlisting}
       
   693 %% \emphbar{Set the axes limits}
       
   694 %%   \begin{lstlisting}
       
   695 %% In []: xmax = 2*pi
       
   696 %% In []: xlim(xmin, xmax) 
       
   697 %% In []: ylim(ymin-0.2, ymax+0.2) 
       
   698 %%   \end{lstlisting}
       
   699 %% \end{frame}
       
   700 
       
   701 %% \begin{frame}[fragile]
       
   702 %% \frametitle{Review Problem}
       
   703 %% \begin{enumerate}
       
   704 %% \item Plot x, -x, sin(x), xsin(x) in range $-5\pi$ to $5\pi$
       
   705 %% \item Add a legend
       
   706 %% \item Annotate the origin
       
   707 %% \item Set axes limits to the range of x
       
   708 %% \end{enumerate}
       
   709 %% \begin{lstlisting}
       
   710 %% In []: x=linspace(-5*pi, 5*pi, 500)
       
   711 %% In []: plot(x, x, 'b')
       
   712 %% In []: plot(x, -x, 'b')
       
   713 %% \end{lstlisting}
       
   714 %% $\vdots$
       
   715 %% \end{frame}
       
   716 
       
   717 %% \begin{frame}[fragile]
       
   718 %% \frametitle{Review Problem \ldots}
       
   719 %% \begin{lstlisting}
       
   720 %% In []: plot(x, sin(x), 'g', linewidth=2)
       
   721 %% In []: plot(x, x*sin(x), 'r', 
       
   722 %%             linewidth=3)
       
   723 %% \end{lstlisting}
       
   724 %% \begin{lstlisting}
       
   725 %% In []: legend(['x', '-x', 'sin(x)', 
       
   726 %%                'xsin(x)'])
       
   727 %% In []: annotate('origin', xy = (0, 0))
       
   728 %% In []: xlim(-5*pi, 5*pi)
       
   729 %% In []: ylim(-5*pi, 5*pi)
       
   730 %% \end{lstlisting}
       
   731 %% \end{frame}
       
   732 
       
   733 %% \begin{frame}[fragile]
       
   734 %% \frametitle{Saving Commands}
       
   735 %% Save commands of review problem into file
       
   736 %% \begin{itemize}
       
   737 %% \item Use \typ{\%hist} command of IPython 
       
   738 %% \item Identify the required line numbers
       
   739 %% \item Then, use \typ{\%save} command of IPython
       
   740 %% \end{itemize}
       
   741 %% \typ{In []: \%hist}\\
       
   742 %% \typ{In []: \%save four_plot.py} \alert{\typ{16 18-27}} 
       
   743 %% \begin{block}{Careful about errors!}
       
   744 %%   \kwrd{\%hist} will contain the errors as well,\\
       
   745 %%   so be careful while selecting line numbers.
       
   746 %% \end{block}
       
   747 %% \end{frame}
       
   748 
       
   749 %% \begin{frame}
       
   750 %% \frametitle{Python Scripts\ldots}
       
   751 %%  This is called a Python Script.
       
   752 %%  \begin{itemize}
       
   753 %%  \item run the script in IPython using \typ{\%run -i four_plot.py}\\
       
   754 %%  \end{itemize}
       
   755 %% \end{frame}
       
   756 
       
   757 %% \begin{frame}[fragile]
       
   758 %%   \frametitle{What did we learn?}
       
   759 %%   \begin{itemize}
       
   760 %%     \item \kwrd{\%hist}
       
   761 %%     \item Saving commands to a script
       
   762 %%     \item Running a script using \kwrd{\%run -i}
       
   763 %%     \item Creating simple plots.
       
   764 %%     \item Adding labels and legends.
       
   765 %%     \item Annotating plots.
       
   766 %%     \item Changing the looks: size, linewidth
       
   767 %%   \end{itemize}
       
   768 %% \end{frame}
       
   769 
       
   770 \end{document}
       
   771