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CS 1110, Week 14 Notes

by: Eunice

CS 1110, Week 14 Notes CS 1110-002


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About this Document

Object Oriented Programming, Inheritance Data Visualization (pyplot, numpy and arrays)
Intro to Computing using Python
Lee, Van Loan
Class Notes
CS, Python
25 ?




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This 2 page Class Notes was uploaded by Eunice on Friday May 6, 2016. The Class Notes belongs to CS 1110-002 at Cornell University taught by Lee, Van Loan in Spring 2016. Since its upload, it has received 39 views. For similar materials see Intro to Computing using Python in ComputerScienence at Cornell University.

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Date Created: 05/06/16
CS 1110 Van Loan and Lee Spring 2016 May 3, 2016  Object-Oriented Programming (OOP) o see ThinkPython chapter 18 o examples used involve playing cards  decks vs. hands  can do certain things with both but also some methods won’t be shared o def __str__(self)  a special method that “pretty prints” o Inheritance  in defining a class instead of having “class Child(object)”  if you have “class Child(Parent)” the new class (Child) inherits, or is able to use all the methods from the other class (Parent)  any method from Parent that is redefined in Child is overridden by the new definition  in using Child class, you can use methods defined in the Parent class and apply it (it has been inherited) May 5, 2016  Probability o of a full house in a hand  5 card hand: two of one rank, three of another  Data Visualization o how to define a useful class for manipulating (for ex.) sunrise/sunset data o how to graphically display facts about that data using numpy and pyplot  pyplot allows you to easily graph  numpy arrays  within numpy, there’s an array type o you can add, subtract, multiply, divide arrays  requires same length  1-dimensional array basics o example of 3 element 1d array: o from numpy import * o x = array([1,2,3])  built in linspace function o can’t be used on a python list, can be used in an numpy array  2d arrays in python o first index, second index  in a list of lists, the first indicates the list item and the second indicates the item in the list item  in a 2d array, it’s like row and column o A = array ((3,3))  python sets aside a 3 by 3 array space  pylab


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