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| author | Puneeth Chaganti | 2010-12-01 16:51:35 +0530 |
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| committer | Puneeth Chaganti | 2010-12-01 16:51:35 +0530 |
| commit | f3a34dfb4e879f3eb7274704f44546aac4add88f (patch) | |
| tree | 1cb0a8cc5dbd5ee2b374350915ed2addfa0fb447 /accessing_parts_of_arrays/slides.tex | |
| parent | 347866ed0d29db61ee062563b1e1616cfb85588c (diff) | |
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Renamed all LOs to match with their names in progress.org.
Diffstat (limited to 'accessing_parts_of_arrays/slides.tex')
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diff --git a/accessing_parts_of_arrays/slides.tex b/accessing_parts_of_arrays/slides.tex new file mode 100644 index 0000000..a3e4c6d --- /dev/null +++ b/accessing_parts_of_arrays/slides.tex @@ -0,0 +1,214 @@ +% Created 2010-11-02 Tue 17:47 +\documentclass[presentation]{beamer} +\usepackage[latin1]{inputenc} +\usepackage[T1]{fontenc} +\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}} + +\title{Accessing parts of arrays} +\author{FOSSEE} +\date{} + +\usetheme{Antibes}\usecolortheme{lily}\useoutertheme{infolines}\setbeamercovered{transparent} +\begin{document} + +\maketitle + + + + + + + + + +\begin{frame} +\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{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} + +\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{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{Summary} +\label{sec-16} + + You should now be able to -- +\begin{itemize} +\item Manipulate single \& 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 + \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} |