Implement 5 functions in Python that would sort an unsorted list, i.e • def bubble_sort(my_list): • def selection_sort(my_list): • def insertion_sort(my_list): • def quick_sort(mylist): • def insertion_sort(mylist, left, right): Provide a main that uses each of the above functions to sort a list of length 100 and make sure it works as expected Step 2 Add lines of code to the above functions so that apart from sorting the received list, it calculates T(n) and returns it. This means that each of the above functions will have a return value which is the exact number of operations executed to perform the sort. Use a main to test yout T(n) calculation. A good way of testing your T(n) is this. Send a best case scenario, a worst case scenario and an average scenario to your sort function and see what numbers come out for your T(n). Explain what best, worst and average case scenarios will be for a sorting algorithm. Step 3 Use the sort functions with T(n) calculation feature to plot T(n) vs. n for a wide range of list sizes. Say 10, 50, 100, 500, 1000, 5000, 10000, 50000, 100000, 1000000, 10000000. Make sure you use a WORST CASE scenario for your list so that your T(n) is a good reflection of O(n). Do you see your curves aligned with what we learnt about the performance of the sort algorithms Step 4 Using time library in python, time your sort algorithms for the same list sizes that you plotted in step 3 and this time plot algrithm completion time vs n. Interpret the results while compared to the step 3 plot and compared to your knowledge of the algorithm's performances. Don't forget to use WORST CASE scenario. Example for Step 2 in bubble sort: def bubble_sort (my_list): steps = 0 for i in range (0, len (my_list) - 1): for j in range (0, len (my_list) - 1 - i): if my list[j] > my_list[j + 1]: steps += 4 # 4 operations, 3 for the swap and one for the comparison my_list[j], my_list[j + 1] = my_list[j + 1], my_list[j] return steps Code to create a random list of a specific size for steps 3 and 4: import random listSize = 50 rand_list = [random.randint (0,101) for val in range (listSize)] rand_list.sort (reverse=True) print("steps needed for sorting: {}".format (bubble sort (rand list)))
Implement 5 functions in Python that would sort an unsorted list, i.e • def bubble_sort(my_list): • def selection_sort(my_list): • def insertion_sort(my_list): • def quick_sort(mylist): • def insertion_sort(mylist, left, right): Provide a main that uses each of the above functions to sort a list of length 100 and make sure it works as expected Step 2 Add lines of code to the above functions so that apart from sorting the received list, it calculates T(n) and returns it. This means that each of the above functions will have a return value which is the exact number of operations executed to perform the sort. Use a main to test yout T(n) calculation. A good way of testing your T(n) is this. Send a best case scenario, a worst case scenario and an average scenario to your sort function and see what numbers come out for your T(n). Explain what best, worst and average case scenarios will be for a sorting algorithm. Step 3 Use the sort functions with T(n) calculation feature to plot T(n) vs. n for a wide range of list sizes. Say 10, 50, 100, 500, 1000, 5000, 10000, 50000, 100000, 1000000, 10000000. Make sure you use a WORST CASE scenario for your list so that your T(n) is a good reflection of O(n). Do you see your curves aligned with what we learnt about the performance of the sort algorithms Step 4 Using time library in python, time your sort algorithms for the same list sizes that you plotted in step 3 and this time plot algrithm completion time vs n. Interpret the results while compared to the step 3 plot and compared to your knowledge of the algorithm's performances. Don't forget to use WORST CASE scenario. Example for Step 2 in bubble sort: def bubble_sort (my_list): steps = 0 for i in range (0, len (my_list) - 1): for j in range (0, len (my_list) - 1 - i): if my list[j] > my_list[j + 1]: steps += 4 # 4 operations, 3 for the swap and one for the comparison my_list[j], my_list[j + 1] = my_list[j + 1], my_list[j] return steps Code to create a random list of a specific size for steps 3 and 4: import random listSize = 50 rand_list = [random.randint (0,101) for val in range (listSize)] rand_list.sort (reverse=True) print("steps needed for sorting: {}".format (bubble sort (rand list)))
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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