--- a/accessing-pieces-arrays/slides.tex Sun Oct 10 13:46:09 2010 +0530
+++ b/accessing-pieces-arrays/slides.tex Mon Oct 11 00:52:58 2010 +0530
@@ -1,95 +1,203 @@
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%Tutorial slides on Python.
-%
-% Author: FOSSEE
-% Copyright (c) 2009, FOSSEE, IIT Bombay
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-\documentclass[14pt,compress]{beamer}
-%\documentclass[draft]{beamer}
-%\documentclass[compress,handout]{beamer}
-%\usepackage{pgfpages}
-%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
-
-% Modified from: generic-ornate-15min-45min.de.tex
-\mode<presentation>
-{
- \usetheme{Warsaw}
- \useoutertheme{infolines}
- \setbeamercovered{transparent}
-}
-
-\usepackage[english]{babel}
+% Created 2010-10-10 Sun 18:48
+\documentclass[presentation]{beamer}
\usepackage[latin1]{inputenc}
-%\usepackage{times}
\usepackage[T1]{fontenc}
-
-\usepackage{ae,aecompl}
-\usepackage{mathpazo,courier,euler}
-\usepackage[scaled=.95]{helvet}
+\usepackage{fixltx2e}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\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}}
-\definecolor{darkgreen}{rgb}{0,0.5,0}
-
-\usepackage{listings}
-\lstset{language=Python,
- basicstyle=\ttfamily\bfseries,
- commentstyle=\color{red}\itshape,
- stringstyle=\color{darkgreen},
- showstringspaces=false,
- keywordstyle=\color{blue}\bfseries}
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% Macros
-\setbeamercolor{emphbar}{bg=blue!20, fg=black}
-\newcommand{\emphbar}[1]
-{\begin{beamercolorbox}[rounded=true]{emphbar}
- {#1}
- \end{beamercolorbox}
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-
-\newcommand{\typ}[1]{\lstinline{#1}}
-
-\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}} }
-
-% Title page
-\title{Your Title Here}
-
-\author[FOSSEE] {FOSSEE}
-
-\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
+\title{Accessing parts of arrays}
+\author{FOSSEE}
\date{}
-% DOCUMENT STARTS
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
\begin{document}
+\maketitle
+
+
+
+
+
+
+
+
+
\begin{frame}
- \maketitle
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Manipulating one and multi dimensional arrays
+\item Access and change individual elements
+\item Access and change rows and columns
+\item Slicing and striding on arrays to access chunks
+\item Read images into arrays and manipulations
+\end{itemize}
\end{frame}
+\begin{frame}[fragile]
+\frametitle{Sample Arrays}
+\label{sec-2}
+\lstset{language=Python}
+\begin{lstlisting}
+In []: A = array([12, 23, 34, 45, 56])
+
+In []: C = array([[11, 12, 13, 14, 15],
+ [21, 22, 23, 24, 25],
+ [31, 32, 33, 34, 35],
+ [41, 42, 43, 44, 45],
+ [51, 52, 53, 54, 55]])
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{Question 1}
+\label{sec-3}
+
+ Change the last column of \texttt{C} to zeroes.
+\end{frame}
\begin{frame}[fragile]
- \frametitle{Outline}
- \begin{itemize}
- \item
- \end{itemize}
+\frametitle{Solution 1}
+\label{sec-4}
+
+\lstset{language=Python}
+\begin{lstlisting}
+In []: C[:, -1] = 0
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{Question 2}
+\label{sec-5}
+
+ Change \texttt{A} to \texttt{[11, 12, 13, 14, 15]}.
\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 2}
+\label{sec-6}
+
+\lstset{language=Python}
+\begin{lstlisting}
+In []: A[:] = [11, 12, 13, 14, 15]
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{squares.png}
+\label{sec-7}
+
+ \begin{center}
+ \includegraphics[scale=0.6]{squares}
+ \end{center}
+\end{frame}
+\begin{frame}
+\frametitle{Question 3}
+\label{sec-8}
+
+\begin{itemize}
+\item obtain \texttt{[22, 23]} from \texttt{C}.
+\item obtain \texttt{[11, 21, 31, 41]} from \texttt{C}.
+\item obtain \texttt{[21, 31, 41, 0]}.
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 3}
+\label{sec-9}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% All other slides here. %%
-%% The same slides will be used in a classroom setting. %%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\lstset{language=Python}
+\begin{lstlisting}
+In []: C[1, 1:3]
+In []: C[0:4, 0]
+In []: C[1:5, 0]
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{Question 4}
+\label{sec-10}
+
+ Obtain \texttt{[[23, 24], [33, -34]]} from \texttt{C}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 4}
+\label{sec-11}
+\lstset{language=Python}
+\begin{lstlisting}
+In []: C[1:3, 2:4]
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{Question 5}
+\label{sec-12}
+
+ Obtain the square in the center of the image
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 5}
+\label{sec-13}
+
+\lstset{language=Python}
+\begin{lstlisting}
+In []: imshow(I[75:225, 75:225])
+\end{lstlisting}
+\end{frame}
\begin{frame}[fragile]
- \frametitle{Summary}
- \begin{itemize}
- \item
- \end{itemize}
+\frametitle{Question 6}
+\label{sec-14}
+
+ Obtain the following
+\lstset{language=Python}
+\begin{lstlisting}
+[[12, 0], [42, 0]]
+[[12, 13, 14], [0, 0, 0]]
+\end{lstlisting}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 6}
+\label{sec-15}
+
+\lstset{language=Python}
+\begin{lstlisting}
+In []: C[::3, 1::3]
+In []: C[::4, 1:4]
+\end{lstlisting}
\end{frame}
-
\begin{frame}
- \frametitle{Thank you!}
+\frametitle{Summary}
+\label{sec-16}
+
+ You should now be able to --
+\begin{itemize}
+\item Manipulate 1D \& Multi dimensional arrays
+
+\begin{itemize}
+\item Access and change individual elements
+\item Access and change rows and columns
+\item Slice and stride on arrays
+\end{itemize}
+
+\item Read images into arrays and manipulate them.
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Thank you!}
+\label{sec-17}
+
\begin{block}{}
\begin{center}
This spoken tutorial has been produced by the