Difference between revisions of "Algorithms"
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− | '''Algorithms''' are a type of technology used in multiple fields of study that dictate or alter streams of information (in this case we will most be referring to computer science). The code/pseuocode presented on here will be written in Python. | + | '''Algorithms''' are a type of technology used in multiple fields of study that dictate or alter streams of information (in this case we will most be referring to computer science). The code/pseuocode presented on here will be written in Python (### syntax in the code represents comments made in Python code). |
Case Uses For Implementing Algorithms (Engineering and Computer Science) : | Case Uses For Implementing Algorithms (Engineering and Computer Science) : | ||
Line 31: | Line 31: | ||
position = index | position = index | ||
− | while position>0 and alist[position-1]>currentvalue: | + | while position>0 and alist[position-1]>currentvalue: #print integers in natural order[-1] less than the previous number |
alist[position]=alist[position-1] | alist[position]=alist[position-1] | ||
position = position-1 | position = position-1 | ||
Line 37: | Line 37: | ||
alist[position]=currentvalue | alist[position]=currentvalue | ||
− | alist = [54,26,93,17,77,31,44,55,20] | + | alist = [54,26,93,17,77,31,44,55,20] ### this is the array of integers that will be sorted in natural order 0-infinity |
insertionSort(alist) | insertionSort(alist) | ||
print(alist) | print(alist) |
Revision as of 19:26, 13 December 2016
Algorithms are a type of technology used in multiple fields of study that dictate or alter streams of information (in this case we will most be referring to computer science). The code/pseuocode presented on here will be written in Python (### syntax in the code represents comments made in Python code).
Case Uses For Implementing Algorithms (Engineering and Computer Science) :
Common Computer Science Algorithms
Algorithms used in Computer Science are developed and implemented to alter the way data moves in network somehow ( the network representing the collection of data used to create a program/system )
The most common present:
Insertion Sort (sorting algorithm for small number of elements): This Algorithm rearranges a disordered list of integers and rearranges them in natural order. This algorithm is typically used for small array of elements.
Sample Input : [ 8, 3, 9, 0, 2, 7, 4, 5 ] Sample Output : [ 0, 2, 3, 4, 5, 7, 8, 9 ]
Example Python Code
Python Insertion Sort Example 1
def insertionSort(alist):
for index in range(1,len(alist)):
currentvalue = alist[index]
position = index
while position>0 and alist[position-1]>currentvalue: #print integers in natural order[-1] less than the previous number
alist[position]=alist[position-1]
position = position-1
alist[position]=currentvalue
alist = [54,26,93,17,77,31,44,55,20] ### this is the array of integers that will be sorted in natural order 0-infinity
insertionSort(alist)
print(alist)
Python Insertion Sort Example 2
function insertionSort(array A)
for i from 1 to length[A]-1 do
value := A[i]
j := i-1
while j >= 0 and A[j] > value do
A[j+1] := A[j]
j := j-1
done
A[j+1] = value
done