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authorPuneeth Chaganti2010-12-01 16:51:35 +0530
committerPuneeth Chaganti2010-12-01 16:51:35 +0530
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parent347866ed0d29db61ee062563b1e1616cfb85588c (diff)
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-#+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
-
-