# HG changeset patch # User Nishanth # Date 1286817295 -19800 # Node ID 8d61625510b606ee974128f6cd57bc3062afcd45 # Parent 027870d8bae4c4aac93cb9e4cbefde4c7cba03a8# Parent bef342784a40a2d3bace4d975974fb9dd83d02db Merged diff -r bef342784a40 -r 8d61625510b6 advanced-features-functions/questions.rst --- a/advanced-features-functions/questions.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/advanced-features-functions/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -17,6 +17,9 @@ #. only keyword arguments can be in any order, but should be called at the end. + Answer: only keyword arguments can be in any order, but should be called + at the end. + #. Given the following function, identify the keywords with default values. :: @@ -101,8 +104,6 @@ Larger Questions ---------------- -.. A minimum of 2 questions here (along with answers) - 1. 2. diff -r bef342784a40 -r 8d61625510b6 getting-started-files/questions.rst --- a/getting-started-files/questions.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/getting-started-files/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -37,7 +37,7 @@ What is the value of content, at the end of this code block:: f = open('hello.txt') - content = f.read() + pre_content = f.read() content = f.read() f.close() @@ -126,7 +126,7 @@ .. A minimum of 2 questions here. -1. f.read(size) +1. What does ``f.read(size)`` do? #. Print every alternate line of a file, starting at the first line. diff -r bef342784a40 -r 8d61625510b6 loading-data-from-files/questions.rst --- a/loading-data-from-files/questions.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/loading-data-from-files/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -56,8 +56,12 @@ 1. What will happen if one of the cells is empty? -#. Read a column with text? - #. Given a file with 3 columns of data but two different delimiters, what do you think will happen? +#. Read a column with text? + +#. An input file contains 5 columns of data. Use only the second and fourth + columns of data and load into two different variables. + [hint: read the documentation, use the argument ``usecols``] + diff -r bef342784a40 -r 8d61625510b6 loops/questions.rst --- a/loops/questions.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/loops/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -71,12 +71,6 @@ Answer:: - 1 - 2 - 3 - 2 - 4 - 6 3 6 9 @@ -94,5 +88,6 @@ Larger Questions ---------------- -.. A minimum of 2 questions here. +1. A number is called Armstrong number if the sum of cubes of its digits is + equal to the number itself. Find all the three digit Armstrong numbers. diff -r bef342784a40 -r 8d61625510b6 manipulating-strings/questions.rst --- a/manipulating-strings/questions.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/manipulating-strings/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -47,11 +47,11 @@ #. Given a line from a CSV file (comma separated values), convert it to a space separated line. - Answer: line.replace(',' ' ') + Answer: line.replace(',', ' ') -#. Given the string "F.R.I.E.N.D.S" in s, obtain the friends. +#. Given the string "F.R.I.E.N.D.S" in s, obtain the "friends". - Answer: ``s[::2].lower() + Answer: ``s[::2].lower()`` Larger Questions ---------------- diff -r bef342784a40 -r 8d61625510b6 other-type-of-plots/bar-chart-hatch.png Binary file other-type-of-plots/bar-chart-hatch.png has changed diff -r bef342784a40 -r 8d61625510b6 other-type-of-plots/company-a-data.txt --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/other-type-of-plots/company-a-data.txt Mon Oct 11 22:44:55 2010 +0530 @@ -0,0 +1,2 @@ +2.000000000000000000e+03 2.001000000000000000e+03 2.002000000000000000e+03 2.003000000000000000e+03 2.004000000000000000e+03 2.005000000000000000e+03 2.006000000000000000e+03 2.007000000000000000e+03 2.008000000000000000e+03 2.009000000000000000e+03 2.010000000000000000e+03 +2.300000000000000000e+01 5.500000000000000000e+01 3.200000000000000000e+01 6.500000000000000000e+01 8.800000000000000000e+01 5.000000000000000000e+00 1.400000000000000000e+01 6.700000000000000000e+01 2.300000000000000000e+01 2.300000000000000000e+01 1.200000000000000000e+01 diff -r bef342784a40 -r 8d61625510b6 other-type-of-plots/questions.rst --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/other-type-of-plots/questions.rst Mon Oct 11 22:44:55 2010 +0530 @@ -0,0 +1,85 @@ +Objective Questions +------------------- + +.. A mininum of 8 questions here (along with answers) + +1. What is a log-log chart? + + a. A straight line graph + #. A graph on the logarithmic scale + #. A graph on the logarithmic scale with different scales for x and + y axes + #. A graph in which x axis is represented in logarithmic scale. + +Answer: A graph on the logarithmic scale with different scales for x + and y axes + +2. We have two lists with us ``years`` and ``profit``, what statement + can be issued to plot a pie chart to plot the profit for each year, + and each wedge has to be labelled with the corresponding year. + +Answer: pie(profit, labels=years) + +3. We have two lists with us ``years`` and profit``, what statement + can be issued to plot a scatter plot of the data in blue colored + diamonds. ``years`` has to be plotted along x-axis. + +Answer: scatter(year,profit,color='blue',marker='d') + +4. ``scatter(x, y, color='blue', marker='d')`` and ``plot(x, y, + color='b', marker='d')`` does exactly the same. + + a. True + #. False + +Answer: False + +5. ``plot(x, y, 'bd')`` creates a scattered plot in blue color and + diamond markers? + + a. True + #. False + +Answer: True + +6. ``scatter(x, y, 'bd')`` creates a scatter plot in blue color with + diamond markers. + + a. True + #. False + +Answer: False + +7. What statement can be issued to generate a bar chart with 135\ + :sup:`o` hatched bar filled with white. + + a. bar(x, y, color='w', hatch='/') + #. bar(x, y, color='w', hatch='\\') + #. bar(x, y, color='w', hatch='\') + #. bar(x, y, color='w', hatch='|') + +Answer: bar(x, y, color='w', hatch='\\') + +8. What statement can be issued to generate a bar chart with vertical + line hatching. + + a. bar(x, y, color='w', hatch='/') + #. bar(x, y, fill=False, hatch='\\') + #. bar(x, y, fill=False, hatch='|') + #. bar(x, y, color='w', hatch='\') + +Answer: bar(x, y, fill=False, hatch='|') + +Larger Questions +---------------- + +.. A minimum of 2 questions here (along with answers) + +1. Plot a log-log chart of the equation y=4*x\ :sup:`2` + 3*x for x + from -50 to 50. + +2. Plot a bar chart which is filled with white color and which is + hatched with 135\ :sup:`o` slanting lines for the data given in the + `file(company A data) `_ which has years and + profit percentage for each year. + diff -r bef342784a40 -r 8d61625510b6 other-type-of-plots/script.rst --- a/other-type-of-plots/script.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/other-type-of-plots/script.rst Mon Oct 11 22:44:55 2010 +0530 @@ -20,7 +20,6 @@ log plot. We will also see few other plots and also introduce you to the matplotlib help. - Let us start with scatter plot. {{{ switch to the next slide }}} @@ -55,11 +54,12 @@ {{{ close the file and switch to the terminal }}} -To product the scatter plot first we need to load the data from the +To produce the scatter plot first we need to load the data from the file using ``loadtxt``. We learned in one of the previous sessions, and it can be done as :: - year,profit = loadtxt('/home/fossee/other-plot/company-a-data.txt',dtype=type(int())) + year,profit = + loadtxt('/home/fossee/other-plot/company-a-data.txt',dtype=type(int())) Now in-order to generate the scatter graph we will use the function ``scatter()`` @@ -100,9 +100,9 @@ pie(profit,labels=year) -Notice that we passed two arguments to the function ``pie()``. The -first one the values and the next one the set of labels to be used in -the pie chart. +Notice that we passed two arguments to the function ``pie()``. First +one the values and the next one the set of labels to be used in the +pie chart. {{{ switch to the next slide which has the problem statement of problem to be tried out }}} @@ -195,14 +195,10 @@ Help about matplotlib can be obtained from matplotlib.sourceforge.net/contents.html -.. #[[Anoop: I am not so sure how to do the rest of it, so I guess we - can just browse through the side and tell them few. What is your - opinion??]] -Now let us see few plots from -matplotlib.sourceforge.net/users/screenshots.html - -{{{ browse through the site quickly }}} +More plots can be seen at +matplotlib.sourceforge.net/users/screenshots.html and also at +matplotlib.sourceforge.net/gallery.html {{{ switch to recap slide }}} diff -r bef342784a40 -r 8d61625510b6 savefig/script.rst --- a/savefig/script.rst Mon Oct 11 13:42:52 2010 +0530 +++ b/savefig/script.rst Mon Oct 11 22:44:55 2010 +0530 @@ -9,8 +9,16 @@ Savefig ======= -Hello and welcome to the tutorial. In this tutorial you will learn how -to save plots using Python. +{{{ Show the first slide }}} + +Hello and welcome to the tutorial saving plots. + +{{{ switch to next slide, outline slide }}} + +In this tutorial you will learn how to save plots using Python. And +saving in different formats, and locating the file in the file system. + +{{{ switch to next slide, a sine wave}}} Start your IPython interpreter with the command :: @@ -38,9 +46,11 @@ the plot for future use so that you can embed the plot in your reports. +{{{ switch to next slide, savefig() }}} + {{{ Switch the focus to IPython interpreter window }}} -For saving the plot, we will use savefig function, and it has to be +For saving the plot, we will use ``savefig()`` function, and it has to be done with the plot window open. The statement is, :: savefig('/home/fossee/sine.png') @@ -73,6 +83,8 @@ close it and return to IPython interpreter, make sure the plot window is still open, also don't close the file browser window }}} +{{{ switch to next slide, More on savefig() }}} + So in-order to save a plot, we use ``savefig`` function. ``savefig`` can save the plot in many formats, such as pdf - portable document format, ps - post script, eps - encapsulated post script, svg - @@ -81,15 +93,19 @@ .. #[[slide must give the extensions for the files - Anoop]] +{{{ switch to next slide, exercise 1 }}} + Let us now try to save the plot in eps format. ``eps`` stands for encapsulated post script, and it can be embedded in your latex -documents. +documents. Pause here and try to figure it out yourself. {{{ Switch focus to the already open plot window }}} We still have the sine plot with us, and now let us save the plot as ``sine.eps``. +{{{ switch to next slide, solution 1 }}} + {{{ Switch focus to IPython interpreter }}} Now, We will save the plot using the function ``savefig`` :: @@ -105,10 +121,17 @@ Yes! the new file ``sine.eps`` is here. +{{{ switch to next slide, exercise 2 }}} + Now you may try saving the same in pdf, ps, svg formats. -Let us review what we have learned in this session! We have learned to -save plots in different formats using the function ``savefig()``. +{{{ Switch to summary slide }}} + +This brings us to the end of this tutorial, in this tutorial we +learned to save plots using the function ``savefig()``. Saving the +plots in different formats and locating the files in the file system. + +{{{ switch to Thank you slide }}} Thank you! diff -r bef342784a40 -r 8d61625510b6 savefig/slides.org --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/savefig/slides.org Mon Oct 11 22:44:55 2010 +0530 @@ -0,0 +1,99 @@ +#+LaTeX_CLASS: beamer +#+LaTeX_CLASS_OPTIONS: [presentation] +#+BEAMER_FRAME_LEVEL: 1 + +#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\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: Savefig +#+AUTHOR: FOSSEE +#+EMAIL: info@fossee.in +#+DATE: 2010-10-11 Mon + +#+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 + - Saving plots. + - Plotting in different formats. + - Locating the file in the file system. + +* Creating a basic plot + Plot a sine wave from -3pi to 3pi. + #+begin_src python + In []: x = linspace(-3*pi,3*pi,100) + + In []: plot(x, sin(x)) + #+end_src +* savefig() +** savefig() - to save plots + : syntax: savefig(fname) +** example +*** savefig('/home/fossee/sine.png') + - file sine.png saved to the folder /home/fossee + - .png - file type + +* More on savefig() +** Recall + - .png - file type +** File types supported +*** .pdf - PDF(Portable Document Format) +*** .ps - PS(Post Script) +*** .eps - Encapsulated Post Script + ~to be used with~ LaTeX ~documents~ +*** .svg - Scalable Vector Graphics + ~vector graphics~ +*** .png - Portable Network Graphics + ~supports transparency~ +* Exercise 1 + Save the sine plot in the format EPS which can be embedded in LaTeX documents. +* Solution 1 + #+begin_src python + savefig('/home/fossee/sine.eps') + #+end_src +* Exercise 2 + Save the sine plot in PDF, PS and SVG formats. + +* Summary + You should now be able to + - Use ~savefig()~ function + - Save plots in different formats + - PDF + - PS + - PNG + - SVG + - EPS + - Locating the files in file system. + +* 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 -r bef342784a40 -r 8d61625510b6 savefig/slides.tex --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/savefig/slides.tex Mon Oct 11 22:44:55 2010 +0530 @@ -0,0 +1,185 @@ +% Created 2010-10-11 Mon 17:08 +\documentclass[presentation]{beamer} +\usepackage[latin1]{inputenc} +\usepackage[T1]{fontenc} +\usepackage{fixltx2e} +\usepackage{graphicx} +\usepackage{longtable} +\usepackage{float} +\usepackage{wrapfig} +\usepackage{soul} +\usepackage{t1enc} +\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{Savefig} +\author{FOSSEE} +\date{2010-10-11 Mon} + +\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent} +\begin{document} + +\maketitle + + + + + + + + + +\begin{frame} +\frametitle{Outline} +\label{sec-1} + +\begin{itemize} +\item Saving plots. +\item Plotting in different formats. +\item Locating the file in the file system. +\end{itemize} +\end{frame} +\begin{frame}[fragile] +\frametitle{Creating a basic plot} +\label{sec-2} + + Plot a sine wave from -3pi to 3pi. +\begin{verbatim} +In []: x = linspace(-3*pi,3*pi,100) + +In []: plot(x, sin(x)) +\end{verbatim} +\end{frame} +\begin{frame}[fragile] +\frametitle{savefig()} +\label{sec-3} +\begin{itemize} + +\item savefig() - to save plots +\label{sec-3_1}% +\begin{verbatim} + syntax: savefig(fname) +\end{verbatim} + + +\item example +\label{sec-3_2}% +\begin{itemize} + +\item savefig('/home/fossee/sine.png') +\label{sec-3_2_1}% +\begin{itemize} +\item file sine.png saved to the folder /home/fossee +\item .png - file type +\end{itemize} + + +\end{itemize} % ends low level +\end{itemize} % ends low level +\end{frame} +\begin{frame} +\frametitle{More on savefig()} +\label{sec-4} +\begin{itemize} + +\item Recall +\label{sec-4_1}% +\begin{itemize} +\item .png - file type +\end{itemize} + + +\item File types supported +\label{sec-4_2}% +\begin{itemize} + +\item .pdf - PDF(Portable Document Format)\\ +\label{sec-4_2_1}% +\item .ps - PS(Post Script)\\ +\label{sec-4_2_2}% +\item .eps - Encapsulated Post Script\\ +\label{sec-4_2_3}% +\texttt{to be used with} \LaTeX{} \texttt{documents} + +\item .svg - Scalable Vector Graphics\\ +\label{sec-4_2_4}% +\texttt{vector graphics} + +\item .png - Portable Network Graphics\\ +\label{sec-4_2_5}% +\texttt{supports transparency} +\end{itemize} % ends low level +\end{itemize} % ends low level +\end{frame} +\begin{frame} +\frametitle{Exercise 1} +\label{sec-5} + + Save the sine plot in the format EPS which can be embedded in \LaTeX{} documents. +\end{frame} +\begin{frame}[fragile] +\frametitle{Solution 1} +\label{sec-6} + +\begin{verbatim} +savefig('/home/fossee/sine.eps') +\end{verbatim} +\end{frame} +\begin{frame} +\frametitle{Exercise 2} +\label{sec-7} + + Save the sine plot in PDF, PS and SVG formats. +\end{frame} +\begin{frame} +\frametitle{Summary} +\label{sec-8} + + You should now be able to +\begin{itemize} +\item Use \texttt{savefig()} function +\item Save plots in different formats + +\begin{itemize} +\item PDF +\item PS +\item PNG +\item SVG +\item EPS +\end{itemize} + +\item Locating the files in file system. +\end{itemize} + + +\end{frame} +\begin{frame} +\frametitle{Thank you!} +\label{sec-9} + + \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}