The data to be sorted is broken into smaller and smaller chunks, then each individual chunk is sorted, then the chunks are merged together and sorted
divide and conquer
Merge sort is adaptive because it can take advantage of "runs" that are already sorted. We call this algorithm the natural merge sort. Consider the traditional top-down merge sort: Start : 3421758906 Divide: 34217|58906 Divide: 342|17|589|06 Divide: 34|2|1|7|58|9|0|6 Divide: 3|4|2|1|7|5|8|9|0|6 Merge: 34|12|57|89|06 Merge: 1234|5789|06 Merge 12345789|06 Merge: 0123456789 With natural merge sort, we get the following: Start : 3421758906 Divide: 34217|58906 Divide: 342|17|589|06 Divide: 34|2|17|589|06 Merge: 234|15789|06 Merge: 12345789|06 Merge: 0123456789 As you can see, there is one less division and one less merge. However, note that the final division only divides one run (342), all the others are "already sorted" and don't need to be divided any further. With fewer (and longer) runs, there are fewer merges to perform.
There is no key element in a merge sort. Unlike quick sort which requires a key element (a pivot) to recursively divide a subset into two subsets, merge sort simply divides a subset into subsets of 1 element and merges adjacent subsets together to produce sorted subsets. When there is only one subset remaining, the subset is fully sorted.
shell uses an odd number,merge uses an even number?
types of sorting in c language are: insertion sort selection sort bubble sort merge sort two way merge sort heap sort quick sort
divide and conquer
Merge sort is adaptive because it can take advantage of "runs" that are already sorted. We call this algorithm the natural merge sort. Consider the traditional top-down merge sort: Start : 3421758906 Divide: 34217|58906 Divide: 342|17|589|06 Divide: 34|2|1|7|58|9|0|6 Divide: 3|4|2|1|7|5|8|9|0|6 Merge: 34|12|57|89|06 Merge: 1234|5789|06 Merge 12345789|06 Merge: 0123456789 With natural merge sort, we get the following: Start : 3421758906 Divide: 34217|58906 Divide: 342|17|589|06 Divide: 34|2|17|589|06 Merge: 234|15789|06 Merge: 12345789|06 Merge: 0123456789 As you can see, there is one less division and one less merge. However, note that the final division only divides one run (342), all the others are "already sorted" and don't need to be divided any further. With fewer (and longer) runs, there are fewer merges to perform.
There is no key element in a merge sort. Unlike quick sort which requires a key element (a pivot) to recursively divide a subset into two subsets, merge sort simply divides a subset into subsets of 1 element and merges adjacent subsets together to produce sorted subsets. When there is only one subset remaining, the subset is fully sorted.
Merge sort is good for large data sets, while insertion sort is good for small data sets.
shell uses an odd number,merge uses an even number?
types of sorting in c language are: insertion sort selection sort bubble sort merge sort two way merge sort heap sort quick sort
Top down merge sort is the easy way of merge sort in C language . It is used to derived o(n log n) algorithm . This is in par with the other methods.
Can be. (Meaning: you can merge sorted files without loading them entirely into the main memory.)
it has less complexity
Comolexity Not efficent big data
Use merge sortUse tree sort
To merge and sort an array in PHP you need to use the array_merge() and sort() functions like shown in the example below: <?php $array1 = array(1, 5, 3, 9, 7); $array2 = array(8, 2, 6, 4, 0); // merge the arrays $merge = array_merge($array1, $array2); // 1, 5, 3, 9, 7, 8, 2, 6, 4, 0 // sort the array sort($merge); // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ?>