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Diffstat (limited to 'conditionals/slides.org')
-rw-r--r-- | conditionals/slides.org | 100 |
1 files changed, 33 insertions, 67 deletions
diff --git a/conditionals/slides.org b/conditionals/slides.org index 5d2ce93..0f17b45 100644 --- a/conditionals/slides.org +++ b/conditionals/slides.org @@ -18,7 +18,7 @@ #+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, #+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries} -#+TITLE: Accessing parts of arrays +#+TITLE: Conditionals #+AUTHOR: FOSSEE #+EMAIL: #+DATE: @@ -30,81 +30,47 @@ #+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 + In this tutorial, we shall look at + + Using if/else blocks + + Using if/elif/else blocks + + Using the Ternary conditional statement + * Question 1 - Change the last column of ~C~ to zeroes. + Given a number, num. Write an if else block to print num, as is, if + it is divisible by 10, else print 10 * num. * 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] + if num%10 == 0: + print num + else: + print 10*num #+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 + +* ~if/elif~ ladder #+begin_src python - [[12, 0], [42, 0]] - [[12, 13, 14], [0, 0, 0]] + if user == 'admin': + # Do admin operations + elif user == 'moderator': + # Do moderator operations + elif user == 'client': + # Do customer operations #+end_src - -* Solution 6 +* Question 2 + Given a number, num. Write a ternary operator to print num, as is, + if it is divisible by 10, else print 10 * num. +* Solution 2 #+begin_src python - In []: C[::3, 1::3] - In []: C[::4, 1:4] + print num if num%10 == 0 else 10*num #+end_src * Summary - You should now be able to -- - - Manipulate 1D \& 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. + In this tutorial session we learnt + + + What are conditional statements + + if/else statement + + if/elif/else statement + + Ternary conditional statement - ~C if X else Y~ + + and the ~pass~ statement + * Thank you! #+begin_latex \begin{block}{} |