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% Tutorial slides on Python.

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% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>

% Copyright (c) 2005-2009, Prabhu Ramachandran

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% Taken from Fernando's slides.

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\usepackage[scaled=.95]{helvet}

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\usepackage{listings}

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%%% This is from Fernando's setup.

% \usepackage{color}

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% Title page

\title[]{Interactive Plotting}

\author[FOSSEE] {FOSSEE}

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

\date[] {31, October 2009\\Day 1, Session 1}

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%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}

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%% Delete this, if you do not want the table of contents to pop up at

%% the beginning of each subsection:

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{

  \begin{frame}<beamer>

    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

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{

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    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

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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}[fragile]

\frametitle{Starting up...}

\begin{verbatim}

  $ ipython -pylab  

\end{verbatim}

Exiting

\begin{lstlisting}     

  In []: print "Hello, World!"

  In []: ^D

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

\end{lstlisting}

Breaking out of loops

\begin{lstlisting}     

  In []: while True:

    ...:     print "Hello, World!"

    ...:     

  Hello, World!

  Hello, World!^C

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{First Plot}

\begin{lstlisting}

  In []: x = linspace(0, 2*pi, 51)

\end{lstlisting}

\typ{linspace(start, stop, num)} \\

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

\begin{lstlisting}

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

\end{lstlisting}

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

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

\end{frame}

\begin{frame}[fragile]

\frametitle{Adding Labels}

  \begin{lstlisting}

In []: xlabel('x')

  \end{lstlisting}

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

  \begin{lstlisting}

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

  \end{lstlisting}

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

\end{frame}

\begin{frame}[fragile]

\frametitle{Another example}

  \begin{lstlisting}

In []: clf()

In []: y = linspace(0, 2*pi, 51)

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

In []: xlabel('y')

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

  \end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Title and Legends}

\begin{lstlisting}

In []: title('Sinusoids')

#Sets the title of the figure

In []: legend() 

# When plot made with label

# plot(y, -2*sin(-y), label='sin')

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

# When no label, or to change

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Changing Legend Placement}

\begin{lstlisting}

In []: legend(['sin'], loc=5) 

#or 

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

#or

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

#(x,y) is position of lower-left 

#corner of legend in the axes co-ords

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Changing Legend Placement}

\vspace{-0.15in}

\begin{lstlisting}

Location String   Code

===============   ====

'best'            0

'upper right'     1

'upper left'      2

'lower left'      3

'lower right'     4

'right'           5

'center left'     6

'center right'    7

'lower center'    8

'upper center'    9

'center'          10

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Saving \& Closing}

\begin{lstlisting}

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

In []: close()

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Multiple 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)'))

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Showing it better}

\begin{lstlisting}

In []: plot(y, sin(y), 'g')

# plots the curve using green color

In []: plot(y, sin(y), linewidth=2)

# sets the linewidth to 2  

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Annotating}

\begin{lstlisting}

In []: annotate('Sample point',

                (50,200))

# Adds the note 'Sample point' at 

# the point (50, 200)

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Axes lengths}

  \begin{lstlisting}

#Get the axes limits

In []: xmin, xmax = xlim() 

In []: ymin, ymax = ylim() 

#Set the axes limits

In []: xlim( xmin, xmax ) 

In []: ylim( ymin, ymax ) 

  \end{lstlisting}

\end{frame}

\begin{frame}[fragile]

  \begin{center}

  End of Session-1\\

  \alert{Don't Close \typ{IPython}}

  \end{center}

\end{frame}

\end{document}