Renamed all LOs to match with their names in progress.org.

8 files changed, 0 insertions, 1097 deletions

diff --git a/accessing-pieces-arrays/quickref.tex b/accessing-pieces-arrays/quickref.tex
deleted file mode 100644
index 6226b91..0000000
--- a/accessing-pieces-arrays/quickref.tex
+++ /dev/null
@@ -1,12 +0,0 @@
-\textbf{Accessing parts of arrays}
-
-\lstinline|C[i-1, j-1]| to access element i, j in C (mxn).
-\lstinline|C[i-1]| to access i^{th} row
-\lstinline|C[:, j-1]| to access j^{th} column
-
-Assigning to accessed elements, changes them. 
-
-\lstinline|A[m:n:o]| accesses the rows from \lstinline|m|
-to \lstinline|n| (excluded) in steps of \lstinline|o|
-
-Similarly, \lstinline|C[m:n:o, p:q:r]|
diff --git a/accessing-pieces-arrays/script.rst b/accessing-pieces-arrays/script.rst
deleted file mode 100644
index b6567a4..0000000
--- a/accessing-pieces-arrays/script.rst
+++ /dev/null
@@ -1,426 +0,0 @@
-.. Objectives
-.. ----------
-   
-   .. By the end of this tutorial, you will be able to:
-   
-   ..   1. Access and change individual elements of arrays, both one
-   ..   dimensional and multi-dimensional.
-   ..   2. Access and change rows and columns of arrays. 
-   ..   3. Access and change other chunks from an array, using slicing
-   ..   and striding. 
-   ..   4. Read images into arrays and perform processing on them, using
-   ..   simple array manipulations. 
-
-.. Prerequisites
-.. -------------
-
-..   1. getting started with arrays
-
-.. #[anand: internal reviewer not mentioned]     
-.. Author              : Puneeth
-   Internal Reviewer   : 
-   External Reviewer   :
-   Language Reviewer   : Bhanukiran
-   Checklist OK?       : <06-11-2010, Anand,  OK> [2010-10-05]
-
-Script
-------
-
-{{{ Screen shows welcome slide }}}
-
-Welcome to the tutorial on accessing pieces of arrays
-
-{{{ Show the outline for this tutorial }}} 
-
-In this tutorial we shall learn to access individual elements of
-arrays, get rows and columns and other chunks of arrays using
-slicing and striding. 
-
-{{{ switch back to the terminal }}}
-
-As usual, we start IPython, using 
-::
-
-  ipython -pylab 
-
-
-{{ Show the slide with the arrays, A and C }}
-
-Let us have two arrays, A and C, as the sample arrays that we will
-use to work through this tutorial. 
-
-::
-
-  A = array([12, 23, 34, 45, 56])
-
-  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]])
-
-Pause the video here and make sure you have the arrays A and C,
-typed in correctly.
-
-{{{ Pause the recording and type the arrays A,C }}}
-
-Let us begin with the most elementary thing, accessing individual
-elements. Also, let us first do it with the one-dimensional array
-A, and then do the same thing with the two-dimensional array. 
-
-To access, the element 34 in A, we say, 
-
-::
-
-  A[2]
-
-A of 2, note that we are using square brackets.
-
-Like lists, indexing starts from 0 in arrays, too. So, 34, the
-third element has the index 2. 
-
-Now, let us access the element 34 from C. To do this, we say
-::
-
-  C[2, 3]
-
-C of 2,3.
-
-34 is in the third row and the fourth column, and since indexing
-begins from zero, the row index is 2 and column index is 3. 
-
-Now, that we have accessed one element of the array, let us change
-it. We shall change the 34 to -34 in both A and C. To do this, we
-simply assign the new value after accessing the element. 
-::
-
-  A[2] = -34
-  C[2, 3] = -34
-
-Now that we have accessed and changed a single element, let us
-access and change more than one element at a time; first rows and
-then columns.
-
-Let us access one row of C, say the third row. We do it by saying, 
-::
-
-  C[2] 
-
-How do we access the last row of C? We could say,
-::
-
-  C[4] 
-
-for the fifth row, or as with lists, use negative indexing and say
-::
-
-  C[-1]
-
-Now, we could change the last row into all zeros, using either 
-::
-
-  C[-1] = [0, 0, 0, 0, 0]
-
-or 
-
-::
-  
-  C[-1] = 0
-
-Now, how do we access one column of C? As with accessing individual
-elements, the column is the second parameter to be specified (after
-the comma). The first parameter, is replaced with a ``:``. This
-specifies that we want all the elements of that dimension, instead of
-just one particular element. We access the third column by
-
-::
-  
-  C[:, 2]
-
-Following is an exercise that you must do. 
-
-{{ show slide containing Question 1}} 
-
-%%1%% Change the last column of C to zeroes. 
-
-Please, pause the video here. Do the exercises and then continue. 
-
-::
-  
-  C[:, -1] = 0
-
-Since A is one dimensional, rows and columns of A don't make much
-sense. It has just one row and 
-::
-
-  A[:] 
-
-gives the whole of A. 
-
-Following is an exercise that you must do. 
-
-{{ show slide containing Question 2}} 
-
-%%2%% Change ``A`` to ``[11, 12, 13, 14, 15]``. 
-
-Please, pause the video here. Do the exercises and then continue. 
-
-To change A, we say
-::
-
-  A[:] = [11, 12, 13, 14, 15]
-
-Now, that we know how to access, rows and columns of an array, we
-shall learn how to access other pieces of an array. For this
-purpose, we will be using image arrays. 
-
-To read an image into an array, we use the ``imread`` command. We
-shall use the image ``squares.png`` present in ``/home/fossee``. We
-shall first navigate to that path in the OS and see what the image
-contains. 
-
-{{{ switch to the browser and show the image }}}
-
-{{{ switch back to the ipython terminal }}}
-
-Let us now read the data in ``squares.png`` into the array ``I``. 
-::
-
-  I = imread('/home/fossee/squares.png')
-
-We can see the contents of the image, using the command
-``imshow``. We say, 
-::
-
-  imshow(I) 
-
-to see what has been read into ``I``. We do not see white and black
-because, ``pylab`` has mapped white and black to different
-colors. This can be changed by using a different colormap. 
-
-To see that ``I`` is really, just an array, we say, 
-::
-
-  I 
-
-at the prompt, and see that an array is displayed. 
-
-To check the dimensions of any array, we can use ``.shape``. We say
-
-::
-
-  I.shape 
-
-to get the dimensions of the image. As we can see, ``squares.png``
-has the dimensions of 300x300. 
-
-Our goal for this part of the tutorial would be to get the
-top-left quadrant of the image. To do this, we need to access, a
-few of the rows and a few of the columns of the array. 
-
-To access, the third column of C, we said, ``C[:, 2]``. Essentially,
-we are accessing all the rows in column three of C. Now, let us
-modify this to access only the first three rows, of column three
-of C. 
-
-We say, 
-::
-
-  C[0:3, 2]
-
-to get the elements of rows indexed from 0 to 3, 3 not included
-and column indexed 2. Note that, the index before the colon is
-included and the index after it is not included in the slice that
-we have obtained. This is very similar to the ``range`` function,
-where ``range`` returns a list, in which the upper limit or stop
-value is not included.
-
-Now, if we wish to access the elements of row with index 2, and in
-columns indexed 0 to 2 (included), we say, 
-::
-
-  C[2, 0:3]
-
-Following is an exercise that you must do. 
-
-{{ show slide containing Question 3 }} 
-
-%%3%% First, obtain the elements [22, 23] from C. Then, obtain the
-elements [11, 21, 31, 41] from C. Finally, obtain the elements [21,
-31, 41, 0]. 
-
-Please, pause the video here. Do the exercises and then continue. 
-
-{{ show slide containing Solution 3 }}
-
-::
-
-  C[1, 1:3] 
-
-gives the elements [22, 23]
-::
-
-  C[0:4, 0]
-
-gives the elements [11, 21, 31, 41]
-::
-
-  C[1:5, 0]
-
-gives the elements [21, 31, 41, 0]
-
-Note that when specifying ranges, if you are starting from the
-beginning or going up-to the end, the corresponding element may be
-dropped. So, in the previous example to obtain [11, 21, 31, 41], we
-could have simply said, ::
-
-  C[:4, 0]
-
-and 
-::
-
-  C[1:, 0]
-
-gives the elements [21, 31, 41, 0]. If we skip both the indexes,
-we get the slice from end to end, as we already know. 
-
-Following is an exercise that you must do. 
-
-{{ show slide containing Question 4 }} 
-
-%%4%% Obtain the elements [[23, 24], [33, -34]] from C. 
-
-Please, pause the video here. Do the exercises and then continue. 
-
-{{ show slide containing Solution 4 }} 
-
-::
-
-  C[1:3, 2:4] 
-
-gives us the elements, [[23, 24], [33, -34]]. 
-
-Now, we wish to obtain the top left quarter of the image. How do
-we go about doing it? Since, we know the shape of the image to be
-300, we know that we need to get the first 150 rows and first 150
-columns. 
-::
-
-  I[:150, :150]
-
-gives us the top-left corner of the image. 
-
-We use the ``imshow`` command to see the slice we obtained in the
-form of an image and confirm. 
-::
-
-  imshow(I[:150, :150])
-
-Following is an exercise that you must do. 
-
-{{ show slide containing Question 5 }} 
-
-%%5%% Obtain the square in the center of the image.
-
-Please, pause the video here. Do the exercises and then continue. 
-
-{{ show slide containing Solution 5 }} 
-
-::
-
-  imshow(I[75:225, 75:225])
-
-Our next goal is to compress the image, using a very simple
-technique to reduce the space that the image takes on disk while
-not compromising too heavily on the image quality. The idea is to
-drop alternate rows and columns of the image and save it. This way
-we will be reducing the data to a fourth of the original data but
-losing only so much of visual information. 
-
-We shall first learn the idea of striding using the smaller array
-C. Suppose we wish to access only the odd rows and columns (first,
-third, fifth). We do this by, 
-::
-
-  C[0:5:2, 0:5:2]
-
-if we wish to be explicit, or simply, 
-::
-
-  C[::2, ::2]
-
-This is very similar to the step specified to the ``range``
-function. It specifies, the jump or step in which to move, while
-accessing the elements. If no step is specified, a default value
-of 1 is assumed. 
-::
-
-  C[1::2, ::2] 
-
-gives the elements, [[21, 23, 0], [41, 43, 0]]
-
-{{ show slide containing Question 6 }} 
-
-Following is an exercise that you must do. 
-
-%%6%% Obtain the following. 
-[[12, 0], [42, 0]]
-[[12, 13, 14], [0, 0, 0]]
-
-Please, pause the video here. Do the exercises and then continue. 
-
-{{ show slide containing Solution 6 }} 
-
-::
-
-  C[::3, 1::3]
-
-gives the elements [[12, 0], [42, 0]]
-::
-
-  C[::4, 1:4]
-
-gives the elements [[12, 13, 14], [0, 0, 0]]
-
-Now, that we know how to stride over an array, we can drop
-alternate rows and columns out of the image in I. 
-::
-
-  I[::2, ::2]
-
-To see this image, we say, 
-::
-
-  imshow(I[::2, ::2])
-
-This does not have much data to notice any real difference, but
-notice that the scale has reduced to show that we have dropped
-alternate rows and columns. If you notice carefully, you will be
-able to observe some blurring near the edges. To notice this
-effect more clearly, increase the step to 4. 
-::
-
-  imshow(I[::4, ::4])
-
-{{{ show summary slide }}}
-
-That brings us to the end of this tutorial. In this tutorial, we
-have learnt to access parts of arrays, specifically individual
-elements, rows and columns and larger pieces of arrays. We have
-also learnt how to modify arrays, element wise or in larger
-pieces.
-
-{{{ Show the "sponsored by FOSSEE" slide }}}
-
-This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India
-
-Hope you have enjoyed and found it useful.
-Thank you!
-
-.. 
-   Local Variables:
-   mode: rst
-   indent-tabs-mode: nil
-   sentence-end-double-space: nil
-   fill-column: 70
-   End:
diff --git a/accessing-pieces-arrays/slides.org b/accessing-pieces-arrays/slides.org
deleted file mode 100644
index 82801ca..0000000
--- a/accessing-pieces-arrays/slides.org
+++ /dev/null
@@ -1,123 +0,0 @@
-#+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.org.orig b/accessing-pieces-arrays/slides.org.orig
deleted file mode 100644
index 82801ca..0000000
--- a/accessing-pieces-arrays/slides.org.orig
+++ /dev/null
@@ -1,123 +0,0 @@
-#+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 b/accessing-pieces-arrays/slides.tex
deleted file mode 100644
index a3e4c6d..0000000
--- a/accessing-pieces-arrays/slides.tex
+++ /dev/null
@@ -1,214 +0,0 @@
-% 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}
diff --git a/accessing-pieces-arrays/slides.tex.orig b/accessing-pieces-arrays/slides.tex.orig
deleted file mode 100644
index 91e8959..0000000
--- a/accessing-pieces-arrays/slides.tex.orig
+++ /dev/null
@@ -1,199 +0,0 @@
-% 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}
diff --git a/accessing-pieces-arrays/squares.png b/accessing-pieces-arrays/squares.png
deleted file mode 100644
index ee102e6..0000000
--- a/accessing-pieces-arrays/squares.png
+++ /dev/null
diff --git a/accessing-pieces-arrays/tagore-einstein.png b/accessing-pieces-arrays/tagore-einstein.png
deleted file mode 100644
index 0841dd0..0000000
--- a/accessing-pieces-arrays/tagore-einstein.png
+++ /dev/null