Questions tagged [radix-sort]

Radix sort is a sorting algorithm which sorts key/value pairs with integer keys by ordering digits.

Filter by
Sorted by
Tagged with
3
votes
2answers
143 views

Sorting an array of positive integers including 0 much faster than Radix Sort

I was working on an Limit Order Book structure in JS and came up with this algorithm. I am pretty sure this must have already been implemented but couldn't even find a clue over the web. The thing is, ...
4
votes
2answers
49 views

Radix Sort Speed

I have implemented a radix sort algorithm in Python 3. It first finds the maximum number of digits in the list, then changes them to strings and adds 0's. For example, [7, 23, 107, 1, 53] to ['007', '...
1
vote
1answer
137 views

MSD Quick Radix Sort in Place in C++, Object/Pointer Oriented

Memory: O(log2(max)*2)~O(1) Speed: O(log2(max)*n)~O(n) so i did before a MSD Radix Sort in place but i wanted to do one, with out the count, So i join together the quick sort and radix sort. Think as ...
0
votes
1answer
110 views

MSD Radix sort in Place in c++, Object/Pointer Oriented

Memory:O(log(max)base(mod)*mod)Speed:O(log(max)base(mod)*n) I did a radix sort in place to not get a auxliar array. In the process i discorver a few things. Is imposible to do LSD radix sort in place ...
1
vote
1answer
84 views

LSD radix sort (force avoid div or idiv compiler instruction) in C++

I was trying to optimize the Radix Sort code, just because. Nothing more, nothing less. Here it is!!! So tell me, how does it look? Summary: instead of a div or mod ,i use left shift and right shift ...
3
votes
2answers
42 views

Radix sort is deceiving

I wanted to compare radix_sort to quick_sort for values limited to 0..127 so I implemented this : ...
0
votes
1answer
68 views

Time complexity of radix sort

I read time complexity of radix sort is O(wn) or O(n log n), if all n numbers are distinct. After implementation it look to me as if I have implemented radix sort which has time complexity of O(n ^2). ...
1
vote
1answer
126 views

Radix sort function in R

I know that sort in R uses radix sort, and I played around in implementing it (mainly to be sure I understood the algorithm properly). However, my implementation is ...
1
vote
1answer
1k views

C++ - Radix sort implementation

I have the following radix sort implementation: ...
3
votes
1answer
384 views

Radix sort implementation in JS (LSD)

I have written LSD radix sort implementation in JavaScript (6 functions in total). It sorts positive and negative integers: ...
1
vote
0answers
189 views

Radix trie optimization

I have got a list of Users that I want to filter using text typed in TextView. I want it to be a smart filter, something like searching contacts in contact book on ...
6
votes
2answers
175 views

Radix Sort Efficiency

I'm implementing a (hopefully) efficient MSB Radix Sort in Java. My current implementation isn't efficient enough for my use-case (see bottom for a brief performance comparison against ...
5
votes
1answer
304 views

Radix Sort speed improvement

I was trying to optimize the Radix Sort code, because I never found a code that was simple and easy to understand yet wasn't any slower. I have seen codes on web and in some books that implement ...
2
votes
2answers
353 views

Radix sort implementation

I have a problem where I need to sort an extremely large number of numbers but the numbers are in a narrow range (0..r-1) where r is typically around 10, and after googling around a bit it seemed like ...
3
votes
2answers
1k views

Implementing RadixSort using JavaScript

Can someone review my code? I am trying to implement radix sort in JavaScript. ...
4
votes
2answers
2k views

Implement LSD radix sort in python

I'm trying to implement LSD radix sort in python, but my code used 4 loop, is there any way I can do it in three or less? Here is the 4 loops: First loop iterate through the input list, convert it ...
0
votes
1answer
1k views

MSD radix sort in C

This time, I have rewritten my radix sort implementation from C++ to C: integer_sort.h: ...
0
votes
1answer
1k views

Radix sort in Java

As homework I had to implement many sorting algorithms including radix sort in Java. The task is to sort doubles in the range [0-1) that are rounded to the 10th ...
1
vote
1answer
3k views

MSD radix sort in C++

I have this MSD radix sort in C++: ...
8
votes
1answer
2k views

Implementing LSD radix sort

I would love a code review of this LSD radix sort implementation. I've rolled my own, and have implemented counting sort as well. I feel like some of the data structures I've chosen could be improved. ...
7
votes
1answer
627 views

Radix sorts in Java

I was curious, how in-place radix sort compares to the variant which uses an auxiliary array in order to speed up the sorting. I implemented both and tested it against ...
3
votes
2answers
2k views

Radix sort with integer divisions

Here's a perhaps naive but simple implementation of Radix sort in Java. It works with any radix, and both positive and negative numbers. ...
3
votes
3answers
6k views

Radix sort with C++

At first the input array is traversed and for each number the lsb is found. Then the number is put into appropriate bucket according to it. For example for an input array { 123, 45}, at first 123 will ...
3
votes
1answer
1k views

Parallel MSD radix sort in Java

I have this parallel implementation of MSD radix sort, which processes the entries by one particular byte. At each byte index, it has three phases: Count the bucket sizes. Insert each entry to its ...
1
vote
0answers
63 views

MSD radix sort in Java for parallel arrays - follow-up 2

The previous and second iteration at: MSD radix sort in Java for parallel arrays - follow-up Changes: arrays[j][i] != arrays[j + 1][i] to ...
4
votes
1answer
798 views

MSD radix sort in Java for parallel arrays - follow-up

The previous and initial iteration at MSD radix sort in Java for parallel arrays. Changes: Entry hides both the sort key and satellite datum in private final ...
3
votes
1answer
690 views

MSD radix sort in Java for parallel arrays

I have this MSD (most-significant digit) radix sort sorting Entry objects holding a sorting key of type long and a satellite ...
4
votes
1answer
1k views

Radix sort (LSD) and counting sort

I'm reading CLRS, and to practice, I rolled my version of radix sort and counting sort. I was looking at some reference implementations, particularly the LSD one from Rosetta Code, and mine performs ...
15
votes
4answers
5k views

Least significant digit (LSD) radix sort of strings

I am learning string algorithms and wrote this C example based on a Java example I found online. Any feedback relating to style, code clarity, whether it is generic enough to be re-used, interface, ...
6
votes
1answer
5k views

Stable radix sort in-place using O(1) space

I am trying to implement a stable radix sort in place with O(1) space. I've seen Wikipedia, and I notice the C implementation is using a temporary variable to hold the sorted value for each pass, and ...