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diff --git a/scipy/basic/03_ipython_plotting.tex b/scipy/basic/03_ipython_plotting.tex new file mode 100644 index 0000000..d0c5bf3 --- /dev/null +++ b/scipy/basic/03_ipython_plotting.tex @@ -0,0 +1,662 @@ +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%Tutorial slides on Python. +% +% Author: FOSSEE +% Copyright (c) 2009-2016, FOSSEE, IIT Bombay +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +\documentclass[14pt,compress]{beamer} + +% Modified from: generic-ornate-15min-45min.de.tex +\mode<presentation> +{ + \usetheme{Warsaw} + \useoutertheme{infolines} + \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[Interactive Plotting]{Introductory Scientific Computing with +Python} +\subtitle{Introduction, IPython and Plotting} + +\author[FOSSEE] {FOSSEE} + +\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay} +\date[] {Mumbai, India +} +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%\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} + \maketitle +\end{frame} + +%% \begin{frame} +%% \frametitle{Outline} +%% \tableofcontents +%% % You might wish to add the option [pausesections] +%% \end{frame} + +\begin{frame} + \frametitle{Acknowledgement} + \Large + \begin{center} + \alert{FOSSEE group (\url{fossee.in})} \\ + based at\\ + \alert{IIT Bombay}\\ + and funded by\\ + The National Mission on Education through ICT, \\ + \alert{Ministry of HRD, India} + \end{center} +\end{frame} + +\section{Checklist} +\begin{frame} +\frametitle{Checklist} + \begin{enumerate} + \item Editor - we recommend \alert{Canopy} + \item IPython + \item Data files: + \begin{itemize} + \item \typ{pendulum.txt} + \item \typ{data.csv} + \end{itemize} + \item Images + \begin{itemize} + \item \typ{lena.png} + \end{itemize} + \end{enumerate} +\end{frame} + +\begin{frame} + \frametitle{About the Tutorial} + \begin{block}{Intended Audience} + \begin{itemize} + \item Engg., Mathematics and Science researchers with a + reasonable programming background. + \end{itemize} + \end{block} + + \begin{block}{Goal: Successful participants will be able to} + \begin{itemize} + \item Start using Python as plotting, computational tool. + \item Use the basic libraries and tools for scientific computing + with Python. + \end{itemize} + \end{block} +\end{frame} + +%% \begin{frame}[fragile] +%% \frametitle{The Python interpreter \ldots} +%% \begin{block}{} +%% \begin{lstlisting} +%% $ python +%% \end{lstlisting} %$ +%% \end{block} +%% \begin{lstlisting} +%% >>> print "Hello, World!" +%% Hello, World! +%% \end{lstlisting} +%% Exiting +%% \begin{lstlisting} +%% >>> ^D(Ctrl-D) +%% $ +%% \end{lstlisting} %$ +%% \end{frame} + +\section{Starting up IPython} +\begin{frame}[fragile] +\frametitle{Starting up \ldots} +\begin{block}{Start a terminal} + \begin{itemize} + \item Canopy command prompt (Tools menu) +\end{itemize} +\end{block} + +\begin{block}{On Terminal} +\begin{lstlisting} + $ ipython --pylab +\end{lstlisting} %$ +\end{block} +\end{frame} + +% \section{Starting up IPython} +% \begin{frame}[fragile] +% \frametitle{Starting up \ldots} +% \begin{block}{Terminal Jupyter} +% \begin{lstlisting} +% $ jupyter console + +% In [1]: %pylab +% \end{lstlisting} %$ +% \end{block} +% \end{frame} + + +\begin{frame}[fragile] +\frametitle{Running IPython} +\begin{lstlisting} + In []: print("Hello, World!") + Hello, World! +\end{lstlisting} + +Exiting on the \textbf{terminal} +\begin{lstlisting} + In []: ^D(Ctrl-D) + Do you really want to exit([y]/n)? y +\end{lstlisting} +\end{frame} + +\begin{frame}[fragile] + \frametitle{IPython? } + \begin{itemize} + \item An enhanced Python interpreter + \end{itemize} +\end{frame} + +% \begin{frame}[fragile] +% \frametitle{Pressed Ctrl-D on Canopy? } +% \begin{itemize} +% \item Pressed \verb+Ctrl-D+ inside Canopy? +% \item You suddenly lost the Python prompt? +% \item Go to \verb+View->Python+ +% \end{itemize} +% \end{frame} + + +\section{Breaking out of loops} +\begin{frame}[fragile] +\frametitle{Breaking out of Loops} +Breaking out of loops +\begin{lstlisting} + In []: while True: + ...: print("Hello, World!") + ...: + Hello, World! + Hello, World!^C(Ctrl-C) + ------------------------------------ + KeyboardInterrupt +\end{lstlisting} +\end{frame} + +\begin{frame}[fragile] + \frametitle{Exercise} + + \begin{itemize} + \item Exit the IPython interpreter + \item Close the terminal + \item Restart the terminal (Canopy tools menu) + \item Restart IPython using: + \end{itemize} +\begin{lstlisting} + $ ipython --pylab +\end{lstlisting} %$ + \inctime{10} +\end{frame} + +\section{Plotting} + +\begin{frame} + \frametitle{Important instructions} + \begin{itemize} + \item For the first session, please do not experiment + \item Follow along and type everything! + \item Case matters + \item Every character you type matters! + \end{itemize} +\end{frame} + +\subsection{Drawing plots} +\begin{frame}[fragile] +\frametitle{First Plot} +\begin{columns} + \column{0.25\textwidth} + \hspace*{-0.25in} + \includegraphics[height=2in, interpolate=true]{data/firstplot} + \column{0.8\textwidth} + \begin{block}{} + \begin{small} +\begin{lstlisting} +In []: x = linspace(0, 2*pi, 50) +In []: plot(x, sin(x)) +\end{lstlisting} + \end{small} + \end{block} +\end{columns} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Walkthrough} +\begin{block}{\typ{x = linspace(start, stop, num)} } +returns \typ{num} evenly spaced points, in the interval [\typ{start}, \typ{stop}]. +\end{block} +\vspace*{.35in} +\begin{block}{} + \small +\begin{lstlisting} +In []: x[0] +Out[]: 0.0 + +In []: x[49] +Out[]: 6.2831853071795862 +\end{lstlisting} +\end{block} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Walkthrough \ldots} +\begin{block}{\typ{plot(x, y)}} +plots \typ{x} and \typ{y} using default line style and color +\end{block} +\inctime{5} +\end{frame} + +\begin{frame} + \frametitle{Important instructions} + \begin{itemize} + \item Please do not close the plot windows or IPython + \item For the first session, please do not experiment + \item Follow along and type everything! + \item Case matters + \item Every character you type matters! + \end{itemize} +\end{frame} + +\subsection{Decoration} +\begin{frame}[fragile] +\frametitle{Adding Labels} +\begin{columns} + \column{0.25\textwidth} + \hspace*{-0.45in} + \includegraphics[height=2in, interpolate=true]{data/label} + \hspace*{0.5in} + \column{0.55\textwidth} + \begin{block}{} + \small + \begin{lstlisting} +In []: xlabel('x') + +In []: ylabel('sin(x)') + \end{lstlisting} + \small +% \end{lstlisting} +%\typ{xlabel(s)} sets the label of the \typ{x}-axis to \typ{s} + +% \begin{lstlisting} + \end{block} +%\typ{ylabel(s)} sets the label of the \typ{y}-axis to \typ{s} +\end{columns} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Another example} + \begin{lstlisting} +In []: clf() + \end{lstlisting} +\emphbar{Clears the plot area.} + \begin{lstlisting} +In []: y = linspace(0, 2*pi, 50) +In []: plot(y, sin(2*y)) +In []: xlabel('y') +In []: ylabel('sin(2y)') + \end{lstlisting} +\end{frame} + +\begin{frame}[fragile] +\frametitle{IPython tips} + +\begin{itemize} +\item Use \typ{TAB} to complete command +\item Try: +\begin{lstlisting} +In []: pl<TAB> +\end{lstlisting} +\end{itemize} +\vspace*{0.5in} + +{\Large \structure{History}} +\begin{itemize} +\item Up arrow and down arrow + +\item Left / right to move and edit + +\item Type some text and press up arrow: +\begin{lstlisting} +In []: pl<Up Arrow> +\end{lstlisting} + +\end{itemize} + +\end{frame} + +\begin{frame}[fragile] + \frametitle{Advanced IPython tips \ldots} + \begin{itemize} +\item Search: \typ{Ctrl-r} and start typing + +\item \typ{Ctrl-a}: go to start of line + +\item \typ{Ctrl-e}: go to end of line + +\item \typ{Ctrl-k}: kill to end of line + \end{itemize} +\end{frame} + + +\subsection{More decoration} +\begin{frame}[fragile] +\frametitle{Title and Legends} +\vspace*{-0.15in} +% \begin{block}{} +% \small +\begin{lstlisting} +In []: title('Sinusoids') +In []: legend(['sin(2y)']) +\end{lstlisting} +% \small +% \end{block} + \vspace*{-0.1in} + \begin{center} + \includegraphics[height=2in, interpolate=true]{data/legend} + \end{center} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Legend Placement} +\begin{block}{} + \small +\begin{lstlisting} +In []: legend(['sin(2y)'], loc='center') +\end{lstlisting} +\end{block} + +\begin{columns} + \column{0.6\textwidth} + \includegraphics[height=2in, interpolate=true]{data/position} +\column{0.45\textwidth} +\vspace{-0.2in} +\begin{lstlisting} +'best' +'right' +'left' +'center' +\end{lstlisting} +\end{columns} +\inctime{15} +\end{frame} + +\begin{frame} + \frametitle{Important instructions} + \begin{itemize} + \item Please do not close the plot windows or IPython + \item For the first session, please do not experiment + \item Follow along and type everything! + \item Case matters + \item Every character you type matters! + \end{itemize} +\end{frame} + +%% \begin{frame}[fragile] +%% \frametitle{For arbitrary location} +%% \vspace*{-0.1in} +%% \begin{lstlisting} +%% In []: legend(['sin(2y)'], loc=(.8,.1)) +%% \end{lstlisting} +%% \emphbar{Specify south-east corner position} +%% %\vspace*{-0.2in} +%% \begin{center} +%% \includegraphics[height=2in, interpolate=true]{data/loc} +%% \end{center} +%% %\inctime{10} +%% \end{frame} + +\begin{frame}[fragile] +\frametitle{Showing it better} +\vspace{-0.15in} +\begin{lstlisting} +In []: plot(y, cos(y), 'r') +# See a red plot! + +In []: clf() +In []: plot(y, sin(y), 'g', linewidth=2) +\end{lstlisting} +\vspace*{-0.2in} +\begin{center} + \includegraphics[height=2.2in, interpolate=true]{data/green} +\end{center} +%\inctime{10} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Annotating} +\vspace*{-0.1in} +\begin{lstlisting} +In[]: annotate('local max', xy=(1.5, 1)) +\end{lstlisting} +\vspace*{-0.2in} +\begin{center} + \includegraphics[height=3in, interpolate=true]{data/annotate} +\end{center} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Saving \& Closing} +\begin{lstlisting} +In []: savefig('sin.png') + +In []: close() +\end{lstlisting} +Some supported formats: +\begin{itemize} +\item png +\item pdf +\item svg +\end{itemize} +\end{frame} + +\begin{frame}[fragile] + \frametitle{Recap} + \begin{itemize} + \item \typ{linspace(start, end, num)} + \item \typ{plot(x, y)} + \item \typ{clf()} + \item \typ{xlabel, ylabel} + \item \typ{title, legend, annotate} + \item \typ{savefig} + \item \typ{close} + \end{itemize} + \inctime{10} +\end{frame} + +\section{Multiple plots} +\begin{frame}[fragile] + \frametitle{Overlaid Plots} +\begin{lstlisting} +In []: y = linspace(0, 2*pi, 50) +\end{lstlisting} + +\begin{lstlisting} +In []: clf() +In []: plot(y, sin(y)) +In []: plot(y, cos(y)) +In []: xlabel('y') +In []: ylabel('f(y)') +In []: legend(['sin(y)', 'cos(y)']) +# Note how we made two legends +\end{lstlisting} + + +\emphbar{By default plots would be overlaid!} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Plotting separate figures} +\begin{lstlisting} +In []: clf() +In []: figure(1) +In []: plot(y, sin(y)) +In []: figure(2) +In []: plot(y, cos(y)) +In []: savefig('cosine.png') +In []: figure(1) +In []: title('sin(y)') +In []: savefig('sine.png') +In []: close() +In []: close() +\end{lstlisting} +\end{frame} + +\begin{frame}[fragile] +\frametitle{Get Axes lengths} +\emphbar{Getting axes lengths} + \begin{lstlisting} +In []: xmin, xmax = xlim() +In []: ymin, ymax = ylim() +In []: print(xmin, xmax) +\end{lstlisting} +\pause +\emphbar{Set the axes limits} + \begin{lstlisting} +In []: xlim(xmin, 2*pi ) +In []: ylim(ymin-0.2, ymax+0.2) + \end{lstlisting} +\end{frame} + +\begin{frame}[plain,fragile] + \frametitle{Axes lengths} + \vspace*{-0.2in} + \begin{center} + \includegraphics[height=3.25in, interpolate=true]{data/limits} + \end{center} +\end{frame} + +\begin{frame}[fragile] +\frametitle{IPython tip: documentation} + +\begin{itemize} + + \item Try: +\begin{lstlisting} +In []: plot? +\end{lstlisting} + \vspace*{0.2in} + to get more information on \typ{plot} + + \item Use arrow keys to scroll docs + \item Note: exit help pager with ``q'' +\end{itemize} +\end{frame} + +\begin{frame}[fragile] +\frametitle{IPython tip: source} +\begin{itemize} + \item Try: +\begin{lstlisting} +In []: plot?? +\end{lstlisting} + to see the source code for \typ{plot} + +\end{itemize} +\inctime{10} +\end{frame} + + +\begin{frame}[plain,fragile] +\frametitle{Review Problem} +\begin{enumerate} +\item Plot $x, -x, \sin(x), x \sin(x)$ in range $-5\pi$ to $5\pi$ +\item Add a legend +\item Annotate the origin +\item Set axes limits to the range of x +\end{enumerate} +\vspace*{-0.15in} +\begin{center} + \includegraphics[height=2.6in, interpolate=true]{data/four_plot} +\end{center} +\end{frame} + +\end{document} |