What would you like to do?
What are advantages and disadvantages of selection sort?
advantages: . we get more breeds and more animals/plants easier . people can make more more Disadvantages . the animals/plants can have genetic diseases . It is hard t…o get rid of the genetic diseases because you have to breed them out
They may cause mutations Artifical selection is the process of interntional, or unentitional modeifcation of a species through human actions which encourage the breeding of c…ertain traits over others. Some disadvantages of artificial selection is that it is inhumane, can cause mutations or produce new problems. An example of the inhumane process is the new way of breeding chickens. These chickens are produced without fethers. Critics say the feather-free chickens will suffer more than normal birds. Males might be unable to mate, because they cannot flap their wings, and "naked" chickens of both sexes are more susceptible to parasites, mosquito attacks and sunburn.
Insertion sort provides several advantages: Simple implementation. Efficient for (quite) small data sets. Adaptive, i.e. efficient for data sets that are already substanti…ally sorted: the time complexity is O(n + d), where d is the number of inversions. More efficient in practice than most other simple quadratic, i.e. O(n2) algorithms such as selection sort or bubble sort; the best case (nearly sorted input) is O(n). Stable, i.e. does not change the relative order of elements with equal keys In-place, i.e. only requires a constant amount O(1) of additional memory space Online, i.e. can sort a list as it receives it. Disadvantages of insertion sort; It is less efficient on list containing more number of elements. As the number of elements increases the performance of the program would be slow. Insertion sort needs a large number of element shifts.
The main advantage is that they allow us a way to put information into a meaningful order. The main disadvantage is that even our best sorting algorithms have a O(n log n) pe…rformance, which means that it takes a very long time to sort large sets of data.
Advantages: . determines the fitness of an organism by direct application. . employs a wide range of criteria . provides for opportunism . Disadvantages: . involves a …lot of chance. . some organisms escape the full range of possible criteria . is under employed in boom times, over-employed in lean times. . recessive traits 'hide' from the process. .
advantages of binary heap
Insertion sort provides several advantages: Simple implementation. Efficient for (quite) small data sets. Adaptive, i.e. efficient for data sets that are already subst…antially sorted: the time complexity is O(n + d), where d is the number of inversions. More efficient in practice than most other simple quadratic, i.e. O(n2) algorithms such as selection sort or bubble sort; the best case (nearly sorted input) is O(n). Stable, i.e. does not change the relative order of elements with equal keys In-place, i.e. only requires a constant amount O(1) of additional memory space Online, i.e. can sort a list as it receives it. Disadvantages of insertion sort; It is less efficient on list containing more number of elements. As the number of elements increases the performance of the program would be slow. Insertion sort needs a large number of element shifts
merge sort is the most efficient way of sorting the list of array.
This algorithm has several advantages. It is simple to write, easy to understand and it only takes a few lines of code. The data is sorted in place so there is little memory o…verhead and, once sorted, the data is in memory, ready for processing. The major disadvantage is the amount of time it takes to sort. The average time increases almost exponentially as the number of table elements increase. Ten times the number of items takes almost one hundred times as long to sort.
advantages . Counting-sort is very efficient for sorting an array of integers when the length, n, of the array is not much smaller than the maximum value, k ô 1, that …appears in the array. The radix-sort algorithm, which we now describe, uses several passes of counting-sort to allow for a much greater range of maximum values..
A bubble sort is a sort where adjacent items in the array or list are scanned repeatedly, swapping as necessary, until one full scan performs no swaps. Advantage is simplicit…y. Disadvantage is that it can take N scans, where N is the size of the array or list, because an out of position item is only moved one position per scan. This can be mitigated somewhat by starting with a swap gap of greater than one (typically N/2), scanning until no swaps occur, then halving the gap and repeating until the gap is one. This, of course, is no longer a bubble sort - it is a merge exchange sort.
The advantages to merge sort is it is always fast. Even in itsworst case its runtime is O(nlogn). It is also stable.Disadvantages of Merge sort are that it is not in place so …mergesort uses a lot of memory. It uses extra space proportional to n.This can slow it down when attempting to sort very large data.
Adv: BucketSort is an example of a sorting algorithm that runs in O(n). This is possible only because BucketSort does not rely primarily on comparisons in order to perform sor…ting. Dis: BucketSort is not useful when scanning the buckets for large arrays which is too costly.
Selective tendering has a low cost for production of tender documents since there is a small list of selected firms to tender. Price will be the main determinant for selection…, since all other considerations would have been done already making the analysis process simple and faster.
Interchange sort is better known as selection sort. Thedisadvantages are that it is not a stable sort (equal values maynot be in the same order they were input) and that it ha…s a best,worst and average time complexity of O(n^2). Even a bubble sort hasa best case of O(n) and is a stable sort, but bubble sort is aclassic example of how not to write an algorithm! Any sortingalgorithm that performs worse than bubble sort has no advantagesother than as a purely academic exercise. It has no practicalapplication whatsoever. To understand why selection sort is so abysmal, you need to examinethe algorithm: Given a set of n elements, locate the smallest element and swapwith the first element. That element is now the last element of thesorted set and the unsorted set is thus reduced by 1 element.Repeat for the remaining n-1 unsorted elements (for all n>1). The first iteration of the algorithm takes O(n) time because itrequires n-1 comparisons to determine the smallest element in anunsorted set plus 1 swap operation to put it in place (we ignorethe time difference between a comparison and a swap). The nextiteration finds the next smallest element and that requires O(n-1)time. Even if the set were already sorted to begin with we'vealready performed nearly twice the number of comparisons requiredby a bubble sort. This is because a bubble sort traverses the setin pairs and only swaps pairs if they are in the wrong order. If noswaps occur during an iteration, then the unsorted set is alreadysorted, hence it has a best case of O(n).
Selection sort is ideally suited to sorting small sets and, sinceit does not require random access, can be adapted to sort bothlists and arrays. However, insert sort generally… performs betterwhen sorting arrays. To understand the disadvantage, you need to compare the algorithms.Selection sort starts by treating the entire set as the unsortedset. It then assumes the first element is the largest element andbegins comparing all other elements to this element. When it findsa larger or equal element, the remaining elements are compared tothis element. Once all elements have been compared, the largestelement will have been located. This is then swapped with the lastelement. The last element then becomes the first element of thesorted set and the unsorted set is reduced by one element. Thealgorithm repeats until there is only one element in the unsortedset, at which point the entire set is sorted. That one element isalways the smallest element because everything in the sorted set iseither larger or equal to it, thus it is already in place. Thus for a set of n elements, there are n-1 iterations. Eachiteration requires n-1 comparison operations (where n reduces byone at the end of each iteration) and 1 swap operation. With insert sort we build the sorted set at the beginning of theset rather than the end. A set of one can always be regarded asbeing sorted, thus we begin with a sorted set of 1 and an unsortedset of n-1 elements. We then copy the first element from theunsorted set, thus creating a gap between the sorted and unsortedsets. If the element to the left of that gap is larger than thecopied element, we move that element into the gap, one position tothe right, which subsequently moves the gap one position to theleft. If the gap reaches the beginning of the sorted set or theelement to its left is not larger than the copied element, then weplace the copied element in the gap. We then repeat the process forthe next unsorted element until there are no more unsortedelements. Thus there are n-1 iterations (same as for selection sort) and atleast two copies per iteration (one to move the element out of theunsorted set, and another to move it back into the sorted set). Oneach iteration, a sorted set of k elements will require 1 to kcomparison operations and a similar number of move operations.Since we stop comparing when we have found the insertion point, wewill generally perform fewer comparisons overall than selectionsort unless the unsorted set happens to be in reverse order.However, we will incur more move operations depending on where theinsertion point lands on each iteration (bearing in mind that aswap is equivalent to 3 move operations). Thus for a set of 10 elements, selection sort will perform 9iterations, with 9+8+7+6+5+4+3+2+1=45 comparisons and 2x9=18 swaps(equivalent to 54 move operations), thus we have 99 operations intotal. Insert sort would also require 9 iterations, however the number ofcomparisons and moves will vary. In the best case, where the set isalready sorted, there will be a minimum of 9 comparisons and 18moves (27 operations in total) and in the worst case, where the setis in reverse order, there will be 45 comparisons and3+4+5+6+7+8+9+10+11=63 moves, thus we have 108 operations in total. While there will inevitably be some cases where selection sortoutperforms an insert sort, in the vast majority of cases insertsort will be substantially quicker than selection sort, becauseselection sort will always take 99 operations to sort a set of 10elements, whereas insert sort will take anything from 27 to 108operations, with an average case of 68 operations. Selection sort can be improved slightly by testing the position ofthe largest element. If it is already the final element of theunsorted set, then we do not need to swap, however this adds anextra comparison to each iteration whether we swap or not. Thus thebest case, where the set is already sorted, becomes 54 comparisonswith no swaps, and the worst case becomes 54 comparisons with 18swaps, giving a range of 54 to 108 operations with an average of 81operations. While this will increase the number of cases where aselection sort outperforms insert sort, selection sort still comesoff worst overall.
The advantage of sorting is that it is quicker and easier to findthings when those things are organised in some way. Thedisadvantage is that it takes time to sort those things…. Incomputing terms, the cost of searching a few unsorted items isminimal, but when searching a large number of items (millions orperhaps billions of items), every search will have an unacceptablecost which can only be minimised by initially sorting those items.The cost of that sorting process is far outweighed by the speedwith which we can subsequently locate items. Inserting new elementsinto a sorted set also incurs a cost, but no more than the cost ofsearching for an element, the only difference is we search for theinsertion point rather than a specific element.