1 answer

Comparison of Sorting Algorithms You are required to implement all the sorting algorithms (Bubble, Selection, Insertion...

Question:

Comparison of Sorting Algorithms You are required to implement all the sorting algorithms (Bubble, Selection, Insertion, Quic

Comparison of Sorting Algorithms You are required to implement all the sorting algorithms (Bubble, Selection, Insertion, Quick, Merge). Take help from lecture slides and welb . You will then create arrays of different sizes as instructed below, test each algorithm on each array and record the execution times of each individual algorithm on each array. . You will report these execution times in a table and then write a report explaining the execution times of the sorting algorithms according to the complexity of each algorithm. You will take 3 arrays for execution of algorithms and they should have the following sizes o Size 100 o Size 1000 o Size 10000 You will randomly generate an array of each size and store the whole array in a separate You will then read the whole array from the file and run each algorithm on it . You will save the sorted array returned by each algorithm in a separate file For example, you will create a file containing an unsorted array called size_100.unsorted You then run bubble sort on this array and store the sorted array in "size_100.sorted bubble". Similarly, you will produce one such file using each algorithm. The array must be saved in the file as follows Each number will be separated from another by a space and saved in text format. So the file in a text editor I should see the list of numbers similar to as 2000 565 1 0 445 . Thus, for each unsorted array you will output five sorted arrays (using each algorithm) You will submit the following documents and in zipped form: o The source code o The executable (do not include intermediate binaries) o A two-page report (explained below) O Three text files containing three unsorted arrays. o 15 text files containing 15 sorted arrays, each sorted using a different algorithm The report should include the processing speed of the machine as well as the name of the operating system. For example, "Core i3 running Windows". The report should be precise, logical, to the point and should reflect your own thoughts You cannot use the unsorted arrays of another student. Use your own unsorted arrays .

Answers

import random import sys import time sys.setrecursionlimit (10000) def bubbleSort (arr): n - len (arr) for i in range (n): #def quickSort (alist, start, end): Sorts the list from indexes start to end- 1 inclusive. if endstart 1: p -partition (aldef mergeSort (alist): if len (alist)>1: mid - len (alist)//2 lefthalf-alist[:mid] righthalf-alist [mid:] mergesort (lefthalffiles size 100 . unsorted, size 1000·unsorted, size #implementing sorting algorithms inc- 100 10000·unsorted ] for i if = open ( size +str (inc) + . sorted. bubble , w+ ) f.write( .join (map (str,bubble))) f.close () f-open (size

time complexities:

Bubble Sort -
best - n
worst - n^2

selection Sort -
best - n^2
worst - n^2

insertion sort -
best - n
worst - n^2

Merge Sort -
best - n log(n)
worst - n log(n)

Qucik sort -
best - n log(n)
worst - n^2

The bubble sort is one of the slowest sorting algorithms, but it is also one of the easiest sorts to implement.

selection sort works by starting at the beginning of the array and comparing the first element with the remaining elements.

After examining all the elements, the smallest element is placed in the first position of the array, and the algorithm moves to

the second position.

This process continues until the data is sorted.

Insertion sort is a simple sorting algorithm that builds the final sorted array (or list) one item at a time. It is much less efficient

on large lists than more advanced algorithms such as quicksort, heapsort, or merge sort. However, insertion sort provides\

several advantages.

The Quicksort algorithm is one of the fastest sorting algorithms for large data sets. Quicksort is a divide-and-conquer

algorithm that recursively breaks a list of data into successively smaller sublists consisting of the smaller elements and the

larger elements. The algorithm continues this process until all the data in the list is sorted.

The algorithm divides the list into

sublists by selecting one element of the list as a pivot. Data is sorted around the pivot by moving elements less than the pivot

to the bottom of the list and elements that are greater than the pivot to the top of the list.

MergeSort is a Divide and Conquer algorithm. It divides input array in two halves, calls itself for the two halves and then

merges the two sorted halves. The merge() function is used for merging two halves. The merge(arr, l, m, r) is key process that

assumes that arr[l..m] and arr[m+1..r] are sorted and merges the two sorted sub-arrays into one.

.

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