Bucket sort, or bin sort, is a sorting algorithm that works by partitioning an array into a number of buckets. Each bucket is then sorted individually, either using a different sorting algorithm, or by recursively applying the bucket sorting algorithm. It is a distribution sort, and is a cousin of radix sort in the most to least significant digit flavour. Bucket sort is a generalization of pigeonhole sort. Since bucket sort is not a comparison sort, the O(n log n) lower bound is inapplicable. The computational complexity estimates involve the number of buckets.
Bucket sort works as follows:
Bucket sort works as follows:
- Set up an array of initially empty "buckets."
- Scatter: Go over the original array, putting each object in its bucket.
- Sort each non-empty bucket.
- Gather: Visit the buckets in order and put all elements back into the original array.
Elements are distributed among bins
Then, elements are sorted within each bin
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