%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%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{split} \setbeamercovered{transparent}}\usepackage[english]{babel}\usepackage[latin1]{inputenc}%\usepackage{times}\usepackage[T1]{fontenc}% Taken from Fernando's slides.\usepackage{ae,aecompl}\usepackage{mathpazo,courier,euler}\usepackage[scaled=.95]{helvet}\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}}\newcounter{time}\setcounter{time}{0}\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}\newcommand{\typ}[1]{\lstinline{#1}}\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}} }%%% This is from Fernando's setup.% \usepackage{color}% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}% % Use and configure listings package for nicely formatted code% \usepackage{listings}% \lstset{% language=Python,% basicstyle=\small\ttfamily,% commentstyle=\ttfamily\color{blue},% stringstyle=\ttfamily\color{orange},% showstringspaces=false,% breaklines=true,% postbreak = \space\dots% }%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Title page\title[Plotting using Python]{Plotting experimental data\\}\author[FOSSEE] {FOSSEE}\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}\date[] {31, October 2009\\Day 1, Session 2}%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}%\logo{\pgfuseimage{iitmlogo}}%% Delete this, if you do not want the table of contents to pop up at%% the beginning of each subsection:\AtBeginSubsection[]{ \begin{frame}<beamer> \frametitle{Outline} \tableofcontents[currentsection,currentsubsection] \end{frame}}\AtBeginSection[]{ \begin{frame}<beamer> \frametitle{Outline} \tableofcontents[currentsection,currentsubsection] \end{frame}}% If you wish to uncover everything in a step-wise fashion, uncomment% the following command: %\beamerdefaultoverlayspecification{<+->}%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% DOCUMENT STARTS\begin{document}\begin{frame} \titlepage\end{frame}\begin{frame} \frametitle{Outline} \tableofcontents % You might wish to add the option [pausesections]\end{frame}\section{Creating and running scripts}\begin{frame}[fragile]\frametitle{Python Scripts}\begin{itemize}\item Let us now put all the commands used in the review problem into a file. \item The following commands of IPython help us do this. \end{itemize}\begin{lstlisting} In []: %hist In []: %hist -n\end{lstlisting}\end{frame}\begin{frame}\frametitle{Python Scripts\ldots} \begin{itemize} \item Open a new file in an \alert{editor} \item Copy and paste required lines from the output of \typ{\%hist -n} \item Save the file as \typ{first_plot.py} \end{itemize} \begin{itemize} \item run the file in IPython using \typ{\%run first_plot.py}\\ \end{itemize}\end{frame}\section{Plotting Points}\begin{frame}[fragile]\frametitle{Simple Pendulum - L and T} \begin{itemize} \item Given data of Length and Time-period of a Simple pendulum \item We wish to plot L vs. \alert{$T^2$} \end{itemize} \begin{lstlisting}In []: L = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9]In []: T = [0.6529, 0.8485, 1.0590, 1.2390, 1.4124, 1.5061, 1.6441, 1.7949, 1.8758]\end{lstlisting}\end{frame}\begin{frame}[fragile]\frametitle{Simple Pendulum \ldots}\begin{itemize}\item Let us begin with $L$ vs. \alert{$T$}\end{itemize}\begin{lstlisting} In []: plot(L, T)\end{lstlisting}\begin{itemize}\item But we wish to plot points!\end{itemize}\end{frame}\begin{frame}[fragile]\frametitle{Plotting points}\begin{lstlisting} In []: clf() In []: plot(L, T, 'o') Out[]: [<matplotlib.lines.Line2D object at 0xac17e0c>] In []: clf() In []: plot(L, T, '.') Out[]: [<matplotlib.lines.Line2D object at 0xac17e0c>]\end{lstlisting}\end{frame}\begin{frame}[fragile]\frametitle{Additional Plotting Attributes}\begin{itemize} \item \kwrd{'o'} - Dots \item \kwrd{'.'} - Smaller Dots \item \kwrd{'-'} - Lines \item \kwrd{'- -'} - Dashed lines\end{itemize}\end{frame}\begin{frame}[fragile]\frametitle{Plotting $L$ vs. $T^2$}\begin{itemize}\item We must square each of the values in T\item How to do it?\item T is a \kwrd{list} and we use a \kwrd{for} loop to iterate over it\end{itemize}\end{frame}\begin{frame}[fragile]\frametitle{Plotting $L$ vs $T^2$}\begin{lstlisting}In []: TSq = []In []: for t in T: ....: TSq.append(t*t)In []: plot(L, TSq, '.')Out[]: [<matplotlib.lines.Line2D object at 0xa5b05ac>]\end{lstlisting}\end{frame}\begin{frame}{So what did we learn here??} \begin{itemize} \item lists \item \alert{\kwrd{for}} \end{itemize}\end{frame}\section{Lists}\begin{frame}[fragile] \frametitle{How to create and use lists?}\begin{lstlisting}In []: mtlist = [] #Empty ListIn []: lst = [1,2,3,4] In []: lst[0]+lst[1]+lst[-1]Out[]: 7\end{lstlisting}\end{frame}\begin{frame}[fragile] \frametitle{List: Slicing} \typ{list[initial:final:step]}\begin{lstlisting}In []: lst[1:3] # A slice.Out[]: [2, 3]In []: lst[1:-1]Out[]: [2, 3]\end{lstlisting}\end{frame}\begin{frame}[fragile] \frametitle{List methods}\begin{lstlisting}In []: lst.append([6,7])In []: lstOut[]: [1, 2, 3, 4, 5, [6, 7]]\end{lstlisting}%\inctime{10}\end{frame}\begin{frame}[fragile]\frametitle{\typ{for}}Used to iterate over lists\\ Let us look at another example.\begin{lstlisting}In []: lst = [1,2,3,4,5,6]In []: for num in lst: ....: print num, num*num ....: 1 12 43 94 165 256 36\end{lstlisting}\end{frame}\section{File Handling}\begin{frame}[fragile] \frametitle{File and \kwrd{for}}\begin{lstlisting}In []: f = open('dummyfile')In []: for line in f: ...: print line ...: \end{lstlisting}\inctime{5}\end{frame}\section{Strings}\begin{frame}{Strings}Anything within ``quotes'' is a string!\end{frame}\begin{frame}[fragile]\frametitle{Strings and \typ{split()}} \begin{lstlisting}In []: a = 'hello world'In []: a.split()Out[]: ['hello', 'world'] \end{lstlisting}Now try this: \begin{lstlisting}In []: b = 'KD, MCS, PC, SC, SV'In []: b.split(',')Out[]: ['KD', 'MCS', 'PC', 'SC', 'SV'] \end{lstlisting}\inctime{5}\end{frame}\end{document}