Application System sorts for sorting algorithm part I week 3 in Princeton University algorithm Course

Sorting algorithms are widely used.

Typical applications:

• Sort name
• Sort MP3 music files
• Display Search Results of Google's web page ranking
• List RSS subscriptions in order of titles

After sorting, the following problems become very simple.

• Median)
• Identify abnormal values in statistical data
• Binary Search in the database
• Find duplicate emails in the mailbox

Not a typical application:

• Data Compression
• Computer Graphics
• Computing creature
• Load Balancing

Java System sorting (system sorts)

Arrays. Sort ().

• Different Methods correspond to different basic types.
• There is a method to implement the comparable Interface
• There is a way to use Comparator
• Use optimized quick sorting for basic types and optimized Merge Sorting for objects

The ordering of Java systems is not completely reliable.

Sorting Algorithm types:

Internal sorting:
Insert sorting, select sorting, Bubble sorting, and sieve sorting
Fast sorting, Merge Sorting, heap sorting, Hill sorting, and samplesort)
Card Sorting, red/Black sorting, open sorting, yaroslavskiy sorting, and P sorting

External sorting:
Multi-phase Merge Sorting, stacked merge, and oscillating sorting

String sorting:
Distributed sorting, MSD, LSD, and three-way fast sorting

Parallel sorting ::
Bitonic sorting and batcher parity sorting
Smooth sorting, cube sorting, and column sorting
GPU sorting

Which algorithm should I choose?

Select an algorithm as needed.

	In-situ sorting	Stability	Worst	Average	Best	Remarks
Select sort	Yes		N^ 2/2	N^ 2/2	N^ 2/2	Minimum number of exchanges
Insert sort	Yes	Yes	N^ 2/2	N^ 2/4	N	Applicable to small arrays and partially sorted Arrays
Hill sorting	Yes		?	?	N	Less code, complexity n ^ 1.5
Merge Sorting		Yes	N lgn	N lgn	N lgn	Stable complexity
Fast sorting	Yes		N^ 2/2	2n lnn	N lgn	Fastest speed in practical application
Three-way sorting	Yes		N^ 2/2	2n lnn	N	It is an improvement of normal quick rank.
???	Yes	Yes	N lgn	N lgn	N lgn	God Algorithm

 

 

Application System sorts for sorting algorithm part I week 3 in Princeton University algorithm Course