summaryrefslogtreecommitdiff
path: root/accessing-pieces-arrays
diff options
context:
space:
mode:
Diffstat (limited to 'accessing-pieces-arrays')
-rw-r--r--accessing-pieces-arrays/slides.org.orig123
-rw-r--r--accessing-pieces-arrays/slides.tex.orig199
2 files changed, 322 insertions, 0 deletions
diff --git a/accessing-pieces-arrays/slides.org.orig b/accessing-pieces-arrays/slides.org.orig
new file mode 100644
index 0000000..82801ca
--- /dev/null
+++ b/accessing-pieces-arrays/slides.org.orig
@@ -0,0 +1,123 @@
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [presentation]
+#+BEAMER_FRAME_LEVEL: 1
+
+#+BEAMER_HEADER_EXTRA: \usetheme{Antibes}\usecolortheme{lily}\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: Accessing parts of arrays
+#+AUTHOR: FOSSEE
+#+EMAIL:
+#+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
+ - Manipulating one and multi dimensional arrays
+ - Access and change individual elements
+ - Access and change rows and columns
+ - Slicing and striding on arrays to access chunks
+ - Read images into arrays and manipulations
+* Sample Arrays
+ #+begin_src python
+ 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_src
+* Question 1
+ Change the last column of ~C~ to zeroes.
+* Solution 1
+ #+begin_src python
+ In []: C[:, -1] = 0
+ #+end_src
+* Question 2
+ Change ~A~ to ~[11, 12, 13, 14, 15]~.
+* Solution 2
+ #+begin_src python
+ In []: A[:] = [11, 12, 13, 14, 15]
+ #+end_src
+* squares.png
+ #+begin_latex
+ \begin{center}
+ \includegraphics[scale=0.6]{squares}
+ \end{center}
+ #+end_latex
+* Question 3
+ - obtain ~[22, 23]~ from ~C~.
+ - obtain ~[11, 21, 31, 41]~ from ~C~.
+ - obtain ~[21, 31, 41, 0]~.
+* Solution 3
+ #+begin_src python
+ In []: C[1, 1:3]
+ In []: C[0:4, 0]
+ In []: C[1:5, 0]
+ #+end_src
+* Question 4
+ Obtain ~[[23, 24], [33, -34]]~ from ~C~
+* Solution 4
+ #+begin_src python
+ In []: C[1:3, 2:4]
+ #+end_src
+* Question 5
+ Obtain the square in the center of the image
+* Solution 5
+ #+begin_src python
+ In []: imshow(I[75:225, 75:225])
+ #+end_src
+* Question 6
+ Obtain the following
+ #+begin_src python
+ [[12, 0], [42, 0]]
+ [[12, 13, 14], [0, 0, 0]]
+ #+end_src
+
+* Solution 6
+ #+begin_src python
+ In []: C[::3, 1::3]
+ In []: C[::4, 1:4]
+ #+end_src
+* Summary
+ You should now be able to --
+ - Manipulate single \& multi dimensional arrays
+ - Access and change individual elements
+ - Access and change rows and columns
+ - Slice and stride on arrays
+ - Read images into arrays and manipulate them.
+* 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
+
+
diff --git a/accessing-pieces-arrays/slides.tex.orig b/accessing-pieces-arrays/slides.tex.orig
new file mode 100644
index 0000000..91e8959
--- /dev/null
+++ b/accessing-pieces-arrays/slides.tex.orig
@@ -0,0 +1,199 @@
+% Created 2010-11-03 Wed 15:37
+\documentclass[presentation]{beamer}
+\usetheme{Antibes}\usecolortheme{lily}\useoutertheme{infolines}\setbeamercovered{transparent}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\usepackage{amssymb}
+\usepackage{hyperref}
+\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}
+
+\title{Accessing parts of arrays}
+\author{FOSSEE}
+\date{}
+
+\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}
+
+\begin{verbatim}
+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{verbatim}
+\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}
+
+\begin{verbatim}
+In []: C[:, -1] = 0
+\end{verbatim}
+\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}
+
+\begin{verbatim}
+In []: A[:] = [11, 12, 13, 14, 15]
+\end{verbatim}
+\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}
+
+\begin{verbatim}
+In []: C[1, 1:3]
+In []: C[0:4, 0]
+In []: C[1:5, 0]
+\end{verbatim}
+\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}
+
+\begin{verbatim}
+In []: C[1:3, 2:4]
+\end{verbatim}
+\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}
+
+\begin{verbatim}
+In []: imshow(I[75:225, 75:225])
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Question 6}
+\label{sec-14}
+
+ Obtain the following
+\begin{verbatim}
+[[12, 0], [42, 0]]
+[[12, 13, 14], [0, 0, 0]]
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 6}
+\label{sec-15}
+
+\begin{verbatim}
+In []: C[::3, 1::3]
+In []: C[::4, 1:4]
+\end{verbatim}
+\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}
generated by cgit (git 2.34.1) at 2025-03-20 21:14:24 +0000