Insertion sort!!!
Insertion sort!!!
Sorting:Question: How do you sort out data?
a-z
a-ZA-Z0,1,2,3…..
Looking For Patterns
Question: Why do we sort out data?
Answer: For effective analysis of data?
Common Sorting:
Insertion Sort
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
Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list
Each iteration, insertion sort removes one element from the input data, finds the location it belongs within the sorted list
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Advantages / Disadvantages
Advantages Disadvantages
• Simple It is much less efficient on large lists
• Efficient in practice than most other simple quadratic
• Does not change the relative order of elements with equal key
• Only requires a constant amount O(1) of additional memory space
• Can sort a list as it receives it
Least Advanced to other Algoritms
Best/Worst Array
Best Array:
The best case input is an array that is already sorted.
In this case insertion sort has a linear running time
(i.e., Θ(n)). During each iteration
The first remaining element of the input is only compared with the right-most element of the sorted subsection of the array.
Worst Array:
The simplest worst case input is an array sorted in reverse order
The set of all worst case inputs consists of all arrays where each
element is the smallest or second-smallest of the elements before it.
In these cases every iteration of the inner loop will scan and shift
the entire sorted subsection of the array before inserting the next element.
Now for a Quiz!!!!!!
Please read the set of questions and select the correct answers
Question 1
Complete the following sentence “Insertion Sort is...?
a) “….a complex sorting algorithm”
b) “… a simple sorting algorithm”
c) “…the most efficient sorting algoritm”
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Or select to quit
Correct Answer!!!!!
Well Done go to the next question
Question 2
How does Insertion operate?
a) Builds the final sorted array (or list) one item at a time
b) Builds the final sorted array (or list) in data batches
c) Builds the final sorted array (or list) in reverse order
Correct Answer!!!!!
Well Done go to the next question
Oh No Try Again!
Or select to quit
Question 3
True or False
“One of the advantages of Insertion is that it only requires a constant amount an additional memory space”
True False
Correct Answer!!!!!
Well Done go to the next question
Oh No Try Again!
Or select to quit
Question 4
True of False, Insertion is most efficient on large lists?
True False
Correct Answer!!!!!
Well Done go to the next question
Oh No Try Again!
Or select to quit
Question 5
The Best Array is…
a) Data grouped in alphabetical order
b) Data grouped in reverse order
c) Data already sorted
Correct Answer!!!!!
Well Done go to the next question
Oh No Try Again!
Or select to quit