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%Tutorial slides on Python.

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% Author: FOSSEE 

% Copyright (c) 2009, FOSSEE, IIT Bombay

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% Title page

\title[Basic Plotting]{Python for Scientific Computing : Basic Plotting}

\author[FOSSEE] {FOSSEE}

\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}

\date{}

%% \date[] {7 November, 2009\\Day 1, Session 1}

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% DOCUMENT STARTS

\begin{document}

\begin{frame}

  \maketitle

\end{frame}

%% \begin{frame}

%%   \frametitle{Outline}

%%   \tableofcontents

%%   % You might wish to add the option [pausesections]

%% \end{frame}

%% \begin{frame}

%%   \frametitle{Workshop Schedule: Day 1}

%%   \begin{description}

%% 	\item[Session 1] Sat 09:00--10:00

%% 	\item[Session 2] Sat 10:05--11:05

%% 	\item[Session 3] Sat 11:20--12:20

%% 	\item[Session 4] Sat 12:25--13:25

%%         \item[Quiz 1] Sat 14:25--14:40

%%         \item[Session 5] Sat 14:40--15:25

%%         \item[Session 6] Sat 15:40--16:40

%%         \item[Quiz 2] Sat 16:45--17:00

%%   \end{description}

%% \end{frame}

%% \begin{frame}

%%   \frametitle{Workshop Schedule: Day 2}

%%   \begin{description}

%% 	\item[Session 1] Sun 09:00--10:00

%% 	\item[Session 2] Sun 10:05--11:05

%% 	\item[Session 3] Sun 11:20--12:20

%% 	\item[Session 4] Sun 12:25--13:25

%%         \item[Quiz 1] Sun 14:25--14:40

%%         \item[Session 5] Sun 14:40--15:25

%%         \item[Session 6] Sun 15:40--16:40

%%         \item[Quiz 2] Sun 16:45--17:00

%%   \end{description}

%% \end{frame}

\begin{frame}

  \frametitle{About the Workshop}

  \begin{block}{Intended Audience}

  \begin{itemize}

       \item Engg., Mathematics and Science teachers.

       \item Interested students from similar streams.

  \end{itemize}

  \end{block}  

  \begin{block}{Goal: Successful participants will be able to}

    \begin{itemize}

      \item Use Python as a basic Plotting tool.

      \item Understand how to use Python as a scripting and problem solving language.

    \end{itemize}

  \end{block}

\end{frame}

\section{Getting started}

\begin{frame}

\frametitle{Checklist}

   \begin{itemize}

    \item IPython

    \item Pylab

    %% \item Editor: We recommend scite.

    %% \item Data files: 

    %%   \begin{itemize}

    %%   \item \typ{sslc1.txt}

    %%   \item \typ{pendulum.txt}

    %%   \item \typ{points.txt}

    %%   \item \typ{pos.txt}

    %%   \end{itemize}

    %% \item Python scripts: 

    %%   \begin{itemize}

    %%   \item \typ{sslc_allreg.py}

    %%   \item \typ{sslc_science.py}

    %%   \end{itemize}

    %% \item Images

    %%   \begin{itemize}

    %%   \item \typ{lena.png}

    %%   \item \typ{smoothing.gif}

  \end{itemize}

  %% \end{enumerate}

\end{frame}

\begin{frame}[fragile]

\frametitle{Starting up \ldots}

\begin{block}{}

\begin{verbatim}

  $ ipython -pylab  

\end{verbatim}

\end{block}

\begin{lstlisting}     

  In []: print "Hello, World!"

  Hello, World!

\end{lstlisting}

Exiting

\begin{lstlisting}     

  In []: ^D(Ctrl-D)

  Do you really want to exit([y]/n)? y

\end{lstlisting}

\end{frame}

%% \begin{frame}[fragile]

%% \frametitle{Loops}

%% Breaking out of loops

%% \begin{lstlisting}     

%%   In []: while True:

%%     ...:     print "Hello, World!"

%%     ...:     

%%   Hello, World!

%%   Hello, World!^C(Ctrl-C)

%%   ------------------------------------

%%   KeyboardInterrupt                   

%% \end{lstlisting}

%% \end{frame}

\section{Plotting}

\subsection{Drawing plots}

\begin{frame}[fragile]

\frametitle{First Plot}

\begin{columns}

    \column{0.20\textwidth}

    \hspace*{-0.12in}

  \includegraphics[height=1.2in, interpolate=true]{data/firstplot}

    \column{0.7\textwidth}

    \begin{block}{}

    \begin{small}

\begin{lstlisting}

In []: x=lins<tab>

In []: x=linspace(

 ... : (Ctrl-C)

In []: x = linspace(0, 2*pi, 50)

In []: plot(x, sin(x))

\end{lstlisting}

    \end{small}

    \end{block}

 \begin{block}{Ipython Feature}

    \begin{itemize}

      \item Use Tab for auto-suggestions.

      \item In []: (Ctrl-C) to get back In[] prompt from ...

  \end{itemize}

  \end{block}

\end{columns}

\end{frame}

\begin{frame}[fragile]

\frametitle{Function Documentation}

\begin {block}{}

\begin{lstlisting}

In []: linspace?

\end{lstlisting}

\end{block}

\begin{block}{Ipython Feature}

    \begin{itemize}

      \item linspace? , ? mark after a function shows its documentation

      \item q to exit help  

  \end{itemize}

  \end{block}

\end{frame}

\begin{frame}[fragile]

\frametitle{Walkthrough}

\begin{block}{\typ{x = linspace(start, stop, num)} }

returns \typ{num} evenly spaced points, in the interval [\typ{start}, \typ{stop}].

\end{block}

\begin{lstlisting}

x[0] = start

x[num - 1] = end

\end{lstlisting}

\vspace*{.35in}

\begin{block}{\typ{plot(x, y)}}

plots \typ{x} and \typ{y} using default line style and color

\end{block}

%\inctime{10}

\end{frame}

\subsection{Decoration}

\begin{frame}[fragile]

\frametitle{Adding Labels and title}

\begin{columns}

  \column{0.25\textwidth}

  \hspace*{-0.45in}

  \includegraphics[height=2in, interpolate=true]{data/label}  

  \hspace*{0.5in}

  \column{0.55\textwidth}

  \begin{block}{}

  \small

  \begin{lstlisting}

In []: xlabel('x')

In []: ylabel('sin(x)')

In []: title('Sinusoids')

  \end{lstlisting}

  \small

%  \end{lstlisting}

%\typ{xlabel(s)} sets the label of the \typ{x}-axis to \typ{s}

%  \begin{lstlisting}

  \end{block}

%\typ{ylabel(s)} sets the label of the \typ{y}-axis to \typ{s}

\end{columns}

\end{frame}

%% \begin{frame}[fragile]

%% \frametitle{Another example}

%%   \begin{lstlisting}

%% In []: clf()

%%   \end{lstlisting}

%% \emphbar{Clears the plot area.}

%%   \begin{lstlisting}

%% In []: y = linspace(0, 2*pi, 50)

%% In []: plot(y, sin(2*y))

%% In []: xlabel('y')

%% In []: ylabel('sin(2y)')

%%   \end{lstlisting}

%% \end{frame}

\subsection{More decoration}

\begin{frame}[fragile]

\frametitle{ Legends}

\vspace*{-0.15in}

%  \begin{block}{}

%  \small

\begin{lstlisting}

In []: legend(['sin(x)'])

\end{lstlisting}

%  \small

%  \end{block}

  \vspace*{-0.1in}

  \begin{center}

  \includegraphics[height=2in, interpolate=true]{data/legend}  

  \end{center}

\end{frame}

\begin{frame}[fragile]

\frametitle{Legend Placement}

\begin{block}{}

    \small

\begin{lstlisting}

In []: legend(['sin(x)'], loc = 'center')

\end{lstlisting}

\end{block}

\begin{columns}

    \column{0.6\textwidth}

 \includegraphics[height=1.5in, interpolate=true]{data/position}  

\column{0.35\textwidth}

\vspace{-0.15in}

\begin{lstlisting}

'best' 

'right'

'center'

\end{lstlisting}

\end{columns}

\begin{block}{Ipython Feature}

    \begin{itemize}

      \item Use up arrow and down arrow to get old commands .

  \end{itemize}

  \end{block}

\end{frame}

\begin{frame}[fragile]

\frametitle{Annotate a point }

\begin{lstlisting}

In []:annotate('origin', xy = (0, 0))

\end{lstlisting}

\begin{columns}

    \column{0.6\textwidth}

 \includegraphics[height=2in, interpolate=true]{data/annotate}  

\column{0.45\textwidth}

\vspace{-0.2in}

%% \begin{lstlisting}

%% 'best' 

%% 'right'

%% 'center'

%% \end{lstlisting}

\end{columns}

\end{frame}

%% \begin{frame}[fragile]

%%   \frametitle{For arbitrary location}

%% \vspace*{-0.1in}

%% \begin{lstlisting}

%% In []: legend(['sin(2y)'], loc=(.8,.1)) 

%% \end{lstlisting}

%% \emphbar{Specify south-east corner position}

%% %\vspace*{-0.2in}

%% \begin{center}

%%   \includegraphics[height=2in, interpolate=true]{data/loc}  

%% \end{center}

%% %\inctime{10}

%% \end{frame}

\begin{frame}[fragile]

\frametitle{Saving \& Closing}

\begin{lstlisting}

In []: savefig('sin.png')

\end{lstlisting}

\end{frame}

%%   \begin{lstlisting}

%% In []: clf()

%%   \end{lstlisting}

%% \emphbar{Clears the plot area.}

%%   \begin{lstlisting}

%% In []: y = linspace(0, 2*pi, 50)

%% In []: plot(y, sin(2*y))

%% In []: xlabel('y')

%% In []: ylabel('sin(2y)')

%%   \end{lstlisting}

%% \end{frame}

\section{Multiple plots}

\begin{frame}[fragile]

\frametitle{Overlaid Plots}

\begin{lstlisting}

In []: plot(x, cos(x))

In []: xlabel('x')

In []: ylabel('f(x)')

In []: legend(['sin(x)', 'cos(x)']) 

In []: clf()

\end{lstlisting}

\emphbar{By default plots would be overlaid!}

\end{frame}

\begin{frame}[fragile]

\frametitle{Plotting separate figures}

\begin{lstlisting}

In []: figure(1)

In []: plot(x, sin(x))

In []: figure(2)

In []: plot(x, cos(x))

In []: figure(1)

In []: title('sin(x)')

In []: close()

In []: close()

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Showing it better}

\vspace{-0.15in}

\begin{lstlisting}

In []: plot(x, sin(x), 'g' ,linewidth=2)

In []: clf()

\end{lstlisting}

\vspace*{-0.2in}

\begin{center}

  \includegraphics[height=2.2in, interpolate=true]{data/green}  

\end{center}

%\inctime{10}

\end{frame}

\begin{frame}[fragile]

\frametitle{Showing it better , Using Dots }

\vspace{-0.15in}

\begin{lstlisting}

In []: plot(x, sin(x), '.')

In []: clf()

\end{lstlisting}

\vspace*{-0.2in}

\begin{center}

  \includegraphics[height=2.2in, interpolate=true]{data/dash}  

\end{center}

%\inctime{10}

\end{frame}

%% \begin{frame}[fragile]

%% \frametitle{Review Ipython }

%% \vspace{-0.15in}

%% \begin{lstlisting}

%% In []: lins<tab>

%% In []: function?

%%      :q 

%% (Ctrl-D)

%% In []: ^C(Ctrl-C)

%% \end{lstlisting}

%% %\inctime{10}

%% \end{frame}

\begin{frame}[fragile]

\frametitle{Review Ipython Features }

\vspace{-0.1in}

\begin{itemize}