--- a/getting-started-with-arrays/script.rst	Mon Oct 11 23:03:49 2010 +0530
+++ b/getting-started-with-arrays/script.rst	Tue Oct 12 00:25:01 2010 +0530
@@ -71,6 +71,8 @@
 here and try to do it yourself, try ``ar.tab`` and find a suitable
 method for that.
 
+{{{ switch to next slide, reshape() method }}}
+
 We can use the function ``reshape()`` for that purpose and it can be
 done as,
 ::
@@ -79,6 +81,8 @@
     ar.reshape(4,2)
     ar = ar.reshape(2,4)
 
+{{{ switch to next slide, creating array from list}}}
+
 Now, let us see how to convert a list object to an array. As you have
 already seen, in both of the previous statements we have passed a
 list, so creating an array can be done so, first let us create a list
@@ -110,7 +114,7 @@
 
 {{{ switch to the next slide, unsolved exercise 2 }}}
 
-Find out the shape of the other two arrays that we have created.
+Find out the shape of the other arrays that we have created.
 
 {{{ Array can have only a single type of data }}}
 
@@ -129,6 +133,8 @@
 
 Did you notice it, 
 
+{{{ switch to next slide, implicit type casting }}}
+
 {{{ highlight all the array elements one by one using mouse 
 movements }}}
 
@@ -226,7 +232,7 @@
 Returns an array with element by element multiplication, notice that
 it does not perform matrix multiplication.
 
-{{{ switch to next slide, recap slide }}}
+{{{ switch to next slide, summary slide }}}
 
 So this brings us to the end of this tutorial, in this tutorial we
 covered basics of arrays, how to create an array, converting a list to

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/getting-started-with-arrays/slides.org	Tue Oct 12 00:25:01 2010 +0530
@@ -0,0 +1,132 @@
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [presentation]
+#+BEAMER_FRAME_LEVEL: 1
+
+#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
+#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC
+
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [presentation]
+
+#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
+#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
+
+#+LaTeX_HEADER: \usepackage{listings}
+
+#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
+#+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
+#+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}
+
+#+TITLE: Getting started with arrays
+#+AUTHOR: FOSSEE
+#+EMAIL: info@fossee.in
+#+DATE:    
+
+#+DESCRIPTION: 
+#+KEYWORDS: 
+#+LANGUAGE:  en
+#+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
+#+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc
+
+* Outline
+  - Arrays
+    - why arrays over lists
+  - Creating arrays
+  - Array operations
+
+* Overview of Arrays
+  - Arrays are homogeneous data structures.
+    - elements have to the same data type
+  - Arrays are faster compared to lists
+    - at least /80-100 times/ faster than lists
+
+* Creating Arrays
+  - Creating a 1-dimensional array
+  : In []: a1 = array([1, 2, 3, 4])
+  - Creating a 2-dimensional array
+  : In []: a2 = array([[1,2,3,4],[5,6,7,8]])
+  - Easier method of creating array with consecutive elements.
+  : In []: ar = arange(1,9)
+* ~reshape()~ method
+  - To reshape an array
+  : In []: ar.reshape(2, 4)
+  : In []: ar.reshape(4, 2)
+  : In []: ar = ar.reshape(2, 4)
+
+* Creating ~array~ from ~list~.
+  - ~array()~ method accepts list as argument
+  - Creating a list
+   : In []: l1 = [1, 2, 3, 4]
+  - Creating an array
+    : In []: a3 = array(l1)
+
+* Exercise 1
+  Create a 3-dimensional array of the order (2, 2, 4).
+
+* ~.shape~ of array
+  - ~.shape~
+    To find the shape of the array
+    : In []: a1.shape
+  - ~.shape~
+    returns a tuple of shape
+* Exercise 2
+  Find out the shape of the other arrays(a2, a3, ar) that we have created.
+* Homogeneous data
+  - All elements in array should be of same type
+    : In []: a4 = array([1,2,3,'a string'])
+* Implicit type casting 
+   : In []: a4
+    All elements are type casted to string type
+* ~identity()~, ~zeros()~ methods
+  - ~identity(n)~
+    Creates an identity matrix, a square matrix of order (n, n) with diagonal elements 1 and others 0.
+  - ~zeros((m, n))~
+    Creates an ~m X n~ matrix with all elements 0.
+
+* Learning exercise
+  - Find out about
+    - ~zeros_like()~
+    - ~ones()~
+    - ~ones_like()~
+
+* Array operations
+  - ~a1 * 2~
+    returns a new array with all elements of ~a1~ multiplied by ~2~.
+    - Similarly ~+~, ~-~ \& ~/~.
+  - ~a1 + 2~
+    returns a new array with all elements of ~a1~ summed with ~2~.
+  - ~a1 += 2~
+    adds ~2~ to all elements of array ~a1~.
+    - Similarly ~-=~, ~*=~ \& ~/=~.
+  - ~a1 + a2~
+    does elements-wise addition.
+    - Similarly ~-~, ~*~ \& ~/~.
+  - ~a1 * a2~
+    does element-wise multiplication
+
+  *Note* - array(A) * array(B) does element wise multiplication and not matrix multiplication
+
+* Summary
+  In this tutorial we covered,
+  - Basics of arrays
+  - Creating arrays
+  - Arrays from lists
+  - Basic array operations
+
+* Thank you!
+#+begin_latex
+  \begin{block}{}
+  \begin{center}
+  This spoken tutorial has been produced by the
+  \textcolor{blue}{FOSSEE} team, which is funded by the 
+  \end{center}
+  \begin{center}
+    \textcolor{blue}{National Mission on Education through \\
+      Information \& Communication Technology \\ 
+      MHRD, Govt. of India}.
+  \end{center}  
+  \end{block}
+#+end_latex
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/getting-started-with-arrays/slides.tex	Tue Oct 12 00:25:01 2010 +0530
@@ -0,0 +1,277 @@
+% Created 2010-10-12 Tue 00:20
+\documentclass[presentation]{beamer}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{fixltx2e}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\usepackage{t1enc}
+\usepackage{textcomp}
+\usepackage{marvosym}
+\usepackage{wasysym}
+\usepackage{latexsym}
+\usepackage{amssymb}
+\usepackage{hyperref}
+\tolerance=1000
+\usepackage[english]{babel} \usepackage{ae,aecompl}
+\usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
+\usepackage{listings}
+\lstset{language=Python, basicstyle=\ttfamily\bfseries,
+commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
+showstringspaces=false, keywordstyle=\color{blue}\bfseries}
+\providecommand{\alert}[1]{\textbf{#1}}
+
+\title{Getting started with arrays}
+\author{FOSSEE}
+\date{}
+
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+\begin{document}
+
+\maketitle
+
+
+
+
+
+
+
+
+
+\begin{frame}
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Arrays
+
+\begin{itemize}
+\item why arrays over lists
+\end{itemize}
+
+\item Creating arrays
+\item Array operations
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Overview of Arrays}
+\label{sec-2}
+
+\begin{itemize}
+\item Arrays are homogeneous data structures.
+
+\begin{itemize}
+\item elements have to the same data type
+\end{itemize}
+
+\item Arrays are faster compared to lists
+
+\begin{itemize}
+\item at least \emph{80-100 times} faster than lists
+\end{itemize}
+
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Creating Arrays}
+\label{sec-3}
+
+\begin{itemize}
+\item Creating a 1-dimensional array
+\end{itemize}
+
+\begin{verbatim}
+   In []: a1 = array([1, 2, 3, 4])
+\end{verbatim}
+
+\begin{itemize}
+\item Creating a 2-dimensional array
+\end{itemize}
+
+\begin{verbatim}
+   In []: a2 = array([[1,2,3,4],[5,6,7,8]])
+\end{verbatim}
+
+\begin{itemize}
+\item Easier method of creating array with consecutive elements.
+\end{itemize}
+
+\begin{verbatim}
+   In []: ar = arange(1,9)
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{\texttt{reshape()} method}
+\label{sec-4}
+
+\begin{itemize}
+\item To reshape an array
+\end{itemize}
+
+\begin{verbatim}
+   In []: ar.reshape(2, 4)
+   In []: ar.reshape(4, 2)
+   In []: ar = ar.reshape(2, 4)
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Creating \texttt{array} from \texttt{list}.}
+\label{sec-5}
+
+\begin{itemize}
+\item \texttt{array()} method accepts list as argument
+\item Creating a list
+\begin{verbatim}
+    In []: l1 = [1, 2, 3, 4]
+\end{verbatim}
+
+\item Creating an array
+\begin{verbatim}
+     In []: a3 = array(l1)
+\end{verbatim}
+
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Exercise 1}
+\label{sec-6}
+
+  Create a 3-dimensional array of the order (2, 2, 4).
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{\texttt{.shape} of array}
+\label{sec-7}
+
+\begin{itemize}
+\item \texttt{.shape}
+    To find the shape of the array
+\begin{verbatim}
+     In []: a1.shape
+\end{verbatim}
+
+\item \texttt{.shape}
+    returns a tuple of shape
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Exercise 2}
+\label{sec-8}
+
+  Find out the shape of the other arrays(a2, a3, ar) that we have created.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Homogeneous data}
+\label{sec-9}
+
+\begin{itemize}
+\item All elements in array should be of same type
+\begin{verbatim}
+     In []: a4 = array([1,2,3,'a string'])
+\end{verbatim}
+
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Implicit type casting}
+\label{sec-10}
+
+\begin{verbatim}
+    In []: a4
+\end{verbatim}
+
+    All elements are type casted to string type
+\end{frame}
+\begin{frame}
+\frametitle{\texttt{identity()}, \texttt{zeros()} methods}
+\label{sec-11}
+
+\begin{itemize}
+\item \texttt{identity(n)}
+    Creates an identity matrix, a square matrix of order (n, n) with diagonal elements 1 and others 0.
+\item \texttt{zeros((m, n))}
+    Creates an \texttt{m X n} matrix with all elements 0.
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Learning exercise}
+\label{sec-12}
+
+\begin{itemize}
+\item Find out about
+
+\begin{itemize}
+\item \texttt{zeros\_like()}
+\item \texttt{ones()}
+\item \texttt{ones\_like()}
+\end{itemize}
+
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Array operations}
+\label{sec-13}
+
+\begin{itemize}
+\item \texttt{a1 * 2}
+    returns a new array with all elements of \texttt{a1} multiplied by \texttt{2}.
+
+\begin{itemize}
+\item Similarly \texttt{+}, \texttt{-} \& \texttt{/}.
+\end{itemize}
+
+\item \texttt{a1 + 2}
+    returns a new array with all elements of \texttt{a1} summed with \texttt{2}.
+\item \texttt{a1 += 2}
+    adds \texttt{2} to all elements of array \texttt{a1}.
+
+\begin{itemize}
+\item Similarly \texttt{-=}, \texttt{*=} \& \texttt{/=}.
+\end{itemize}
+
+\item \texttt{a1 + a2}
+    does elements-wise addition.
+
+\begin{itemize}
+\item Similarly \texttt{-}, \texttt{*} \& \texttt{/}.
+\end{itemize}
+
+\item \texttt{a1 * a2}
+    does element-wise multiplication
+\end{itemize}
+
+
+  \textbf{Note} - array(A) * array(B) does element wise multiplication and not matrix multiplication
+\end{frame}
+\begin{frame}
+\frametitle{Summary}
+\label{sec-14}
+
+  In this tutorial we covered,
+\begin{itemize}
+\item Basics of arrays
+\item Creating arrays
+\item Arrays from lists
+\item Basic array operations
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Thank you!}
+\label{sec-15}
+
+  \begin{block}{}
+  \begin{center}
+  This spoken tutorial has been produced by the
+  \textcolor{blue}{FOSSEE} team, which is funded by the 
+  \end{center}
+  \begin{center}
+    \textcolor{blue}{National Mission on Education through \\
+      Information \& Communication Technology \\ 
+      MHRD, Govt. of India}.
+  \end{center}  
+  \end{block}
+\end{frame}
+
+\end{document}