title

Coding Challenge #114: Bubble Sort Visualization

description

Yes, sorting numbers can be fun! In this challenge I attempt to implement the "bubble sort" algorithm in Processing (Java) and visualize the process itself with animated lines. Code: https://thecodingtrain.com/challenges/114-bubble-sort-visualization
(π€π€π€Correction: At 3:53 I incorrectly state that N's growth is exponential, I should have said "quadratic" or "polynomial".)
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References:
π Visualizing Algorithms: https://bost.ocks.org/mike/algorithms/
Live Stream Archive:
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Related Coding Challenges:
π #47 Pixel Sorting in Processing: https://youtu.be/JUDYkxU6J0o
π #143 Quicksort Visualization: https://youtu.be/eqo2LxRADhU
Timestamps:
0:00 Introducing today's topic
1:50 What is a bubble sort?
4:10 Visualizing the array
6:17 Write the sorting algorithm
8:19 Write the swap function
9:30 Animate the sort
12:52 Speed up the sorting
16:41 Conclusion and suggestions
Editing by Mathieu Blanchette
Animations by Jason Heglund
Music from Epidemic Sound
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This description was auto-generated. If you see a problem, please open an issue: https://github.com/CodingTrain/thecodingtrain.com/issues/new
#bubblesortalgorithm #processing

detail

{'title': 'Coding Challenge #114: Bubble Sort Visualization', 'heatmap': [{'end': 374.967, 'start': 358.877, 'weight': 0.913}, {'end': 929.849, 'start': 908.026, 'weight': 1}], 'summary': 'Explores visualizing sorting algorithms, focusing on bubble sort, aiming to encourage creative interpretations, and explains the inefficiency of the bubble sort algorithm with a time complexity of o(n^2). it covers the visual representation of an array in a 600x600 window, the creation of sorting algorithm with manual implementation, and the successful implementation of bubble sort with global variables in the draw loop. additionally, it covers real-time data visualization with a 400x300 window, aiming for a 1.5-hour reduction, animating a flawed selection sort algorithm with 100 iterations per frame, and exploring bubble sort variations to encourage viewer participation and sharing.', 'chapters': [{'end': 238.827, 'segs': [{'end': 51.512, 'src': 'embed', 'start': 22.402, 'weight': 0, 'content': [{'end': 28.126, 'text': "And I'm going to start with the bubble sort, one of the most basic sorting algorithms of them, And I might just do a follow up one with,", 'start': 22.402, 'duration': 5.724}, {'end': 31.046, 'text': 'like a selection sword and then a quicksword and other sorts.', 'start': 28.126, 'duration': 2.92}, {'end': 35.328, 'text': 'So suggest all your fancy sorting algorithms in the comments below.', 'start': 31.066, 'duration': 4.262}, {'end': 43.27, 'text': 'But this is inspired by many things, but most notably probably this article called Visualizing Algorithms by Mike Bostock.', 'start': 36.348, 'duration': 6.922}, {'end': 46.011, 'text': 'This is actually an article from 2014.', 'start': 43.95, 'duration': 2.061}, {'end': 51.512, 'text': 'It has a wonderful set of interactive explanations of different algorithms.', 'start': 46.011, 'duration': 5.501}], 'summary': 'Introduction to basic sorting algorithms with inspiration from visualizing algorithms by mike bostock, 2014.', 'duration': 29.11, 'max_score': 22.402, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH822402.jpg'}, {'end': 91.668, 'src': 'embed', 'start': 70.215, 'weight': 3, 'content': [{'end': 78.78, 'text': "So I think there's a lot of really unique and interesting visual possibilities that you could visualize data and then sort it and visualize that sorting process.", 'start': 70.215, 'duration': 8.565}, {'end': 82.242, 'text': 'Maybe you could sort musical notes, or maybe you could sort text.', 'start': 79.02, 'duration': 3.222}, {'end': 83.583, 'text': "There's so many possibilities.", 'start': 82.423, 'duration': 1.16}, {'end': 89.047, 'text': "So I encourage you to be creative with your own visual interpretation of what I'm going to do and share it with me.", 'start': 83.863, 'duration': 5.184}, {'end': 91.668, 'text': "I'm going to do this in processing, my happy place.", 'start': 89.527, 'duration': 2.141}], 'summary': 'Explore unique visual possibilities in data visualization and sorting using processing.', 'duration': 21.453, 'max_score': 70.215, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH870215.jpg'}, {'end': 212.853, 'src': 'embed', 'start': 187.117, 'weight': 2, 'content': [{'end': 194.606, 'text': 'So I could do the same exact checking the pairs of values, but just do them one at a time all the way up to the last spot.', 'start': 187.117, 'duration': 7.489}, {'end': 202.022, 'text': 'bubble sort is probably the least efficient sorting algorithm.', 'start': 196.536, 'duration': 5.486}, {'end': 209.71, 'text': 'In fact, it is a n squared, a big O notation, big O notation about the order of an algorithm.', 'start': 202.402, 'duration': 7.308}, {'end': 212.853, 'text': 'how long does it take for an algorithm to perform right?', 'start': 209.71, 'duration': 3.143}], 'summary': 'Bubble sort is an inefficient n squared sorting algorithm.', 'duration': 25.736, 'max_score': 187.117, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8187117.jpg'}], 'start': 1.643, 'title': 'Visualizing sorting algorithms and bubble sort', 'summary': "Explores visualizing sorting algorithms, focusing on bubble sort, inspired by mike bostock's work, aiming to encourage creative interpretations from the audience. it also explains the inefficiency of the bubble sort algorithm with a time complexity of o(n^2).", 'chapters': [{'end': 89.047, 'start': 1.643, 'title': 'Visualizing sorting algorithms', 'summary': 'Discusses visualizing the process of sorting algorithms, particularly focusing on the bubble sort and drawing inspiration from an article by mike bostock, aiming to explore unique visual possibilities for sorting various data types and encouraging creative interpretations from the audience.', 'duration': 87.404, 'highlights': ["Drawing inspiration from Mike Bostock's article 'Visualizing Algorithms' from 2014, the narrator plans to visualize the bubble sort algorithm and explore the potential for unique visual representations of sorting processes.", 'The narrator intends to visualize various sorting algorithms, including the bubble sort, selection sort, and quicksort, and invites suggestions for other advanced algorithms from the audience.', 'The narrator encourages creativity in visual interpretations of sorting algorithms, suggesting possibilities like sorting musical notes or text and invites the audience to share their visual interpretations.', 'The narrator expresses excitement about attempting to visualize a sorting algorithm after live streaming for three and a half hours, demonstrating dedication and enthusiasm for the upcoming coding challenge.']}, {'end': 238.827, 'start': 89.527, 'title': 'Bubble sort algorithm', 'summary': "Explains the bubble sort algorithm, a comparison-based sorting algorithm, which involves comparing pairs of numbers and performing swaps, and highlights the algorithm's inefficiency with a time complexity of o(n^2).", 'duration': 149.3, 'highlights': ['Bubble sort involves comparing pairs of numbers and performing swaps to sort a list of numbers. The algorithm starts by comparing pairs of numbers and performing swaps to sort the list of numbers, demonstrating the process through a step-by-step explanation.', "The bubble sort algorithm is characterized by a time complexity of O(n^2), making it inefficient for larger arrays. The algorithm's inefficiency is highlighted by its time complexity of O(n^2), leading to a significant increase in the number of swaps required as the array size grows, making it a slow sorting algorithm."]}], 'duration': 237.184, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH81643.jpg', 'highlights': ['The narrator intends to visualize various sorting algorithms, including the bubble sort, selection sort, and quicksort, and invites suggestions for other advanced algorithms from the audience.', "Drawing inspiration from Mike Bostock's article 'Visualizing Algorithms' from 2014, the narrator plans to visualize the bubble sort algorithm and explore the potential for unique visual representations of sorting processes.", 'The bubble sort algorithm is characterized by a time complexity of O(n^2), making it inefficient for larger arrays.', 'The narrator encourages creativity in visual interpretations of sorting algorithms, suggesting possibilities like sorting musical notes or text and invites the audience to share their visual interpretations.']}, {'end': 724.326, 'segs': [{'end': 273.961, 'src': 'embed', 'start': 241.429, 'weight': 0, 'content': [{'end': 245.552, 'text': "All right, so the next thing we're going to do is we need some way of visually representing the array.", 'start': 241.429, 'duration': 4.123}, {'end': 249.586, 'text': "So I'm going to say void setup, void draw.", 'start': 246.624, 'duration': 2.962}, {'end': 252.428, 'text': "I'm going to make an array.", 'start': 250.687, 'duration': 1.741}, {'end': 254.349, 'text': "I'm going to make a window of size 600, 600.", 'start': 252.508, 'duration': 1.841}, {'end': 257.731, 'text': "I'm going to set the background to zero.", 'start': 254.349, 'duration': 3.382}, {'end': 263.234, 'text': 'I am going to create an array of values.', 'start': 259.672, 'duration': 3.562}, {'end': 265.236, 'text': "And that's going to be an array.", 'start': 264.275, 'duration': 0.961}, {'end': 273.961, 'text': 'I want to have the same number of values that I have as pixels.', 'start': 267.737, 'duration': 6.224}], 'summary': 'Using void setup and void draw to visually represent an array in a 600x600 window with a background set to zero.', 'duration': 32.532, 'max_score': 241.429, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8241429.jpg'}, {'end': 382.532, 'src': 'heatmap', 'start': 352.073, 'weight': 1, 'content': [{'end': 352.753, 'text': "All right, let's think about this.", 'start': 352.073, 'duration': 0.68}, {'end': 355.035, 'text': "So first, let's program that sorting algorithm.", 'start': 352.954, 'duration': 2.081}, {'end': 358.277, 'text': "Let's just do the sort right here.", 'start': 356.536, 'duration': 1.741}, {'end': 363.44, 'text': "First of all, processing, I'm pretty sure, has built into it a function called sort.", 'start': 358.877, 'duration': 4.563}, {'end': 366.742, 'text': 'Ta-da! I sorted it.', 'start': 365.081, 'duration': 1.661}, {'end': 368.223, 'text': 'Good night, thank you very much.', 'start': 367.242, 'duration': 0.981}, {'end': 370.064, 'text': 'See you later.', 'start': 369.624, 'duration': 0.44}, {'end': 374.967, 'text': "No, so I need to write the sorting algorithm myself, so let's do that first.", 'start': 370.264, 'duration': 4.703}, {'end': 382.532, 'text': 'So the first thing I need to do is I need to have i equals 0, i is less than the values.length.', 'start': 375.987, 'duration': 6.545}], 'summary': 'Developing a sorting algorithm using processing with i < values.length', 'duration': 30.459, 'max_score': 352.073, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8352073.jpg'}], 'start': 241.429, 'title': 'Visualizing array data, real-time sorting algorithm, and bubble sort animation', 'summary': 'Covers visual representation of array in 600x600 window, creation of sorting algorithm with emphasis on manual implementation, and successful implementation of bubble sort with global variables in draw loop.', 'chapters': [{'end': 329.656, 'start': 241.429, 'title': 'Visualizing array data', 'summary': 'Discusses how to visually represent an array in a window of size 600x600 using the processing language, including setting up the array, looping over it, and drawing lines to represent the array values.', 'duration': 88.227, 'highlights': ['Setting up a visual representation of an array in a 600x600 window using the processing language.', 'Looping over the array to assign random values based on the height of the window.', 'Drawing lines to visualize the array values in the window.']}, {'end': 491.701, 'start': 329.656, 'title': 'Real-time sorting algorithm', 'summary': 'Discusses the process of creating and implementing a sorting algorithm, detailing the iteration and swapping process, and emphasizing the need for manual implementation instead of using built-in functions, with a focus on achieving real-time visualization.', 'duration': 162.045, 'highlights': ['Emphasizing the need for manual implementation instead of using built-in functions The speaker emphasizes the need to write the sorting algorithm manually instead of using the built-in sort function, highlighting the intention to create a separate function for swapping values in the array.', 'Detailing the iteration and swapping process The speaker details the iterative process of the sorting algorithm, explaining the use of nested loops to check and swap elements in the array, with a decreasing range of elements to check as the iteration progresses.', 'Process of creating and implementing a sorting algorithm The chapter focuses on the process of creating and implementing a sorting algorithm, with an emphasis on achieving real-time visualization of the sorting process on a graphical interface.']}, {'end': 724.326, 'start': 492.062, 'title': 'Sorting and animating with bubble sort', 'summary': 'Explains the implementation of a swap function and the process of sorting and animating with bubble sort using global variables i and j in a draw loop, resulting in the successful completion of the sorting challenge.', 'duration': 232.264, 'highlights': ['The implementation of a swap function is explained, demonstrating the concept of swapping values in an array using temporary storage to prevent overwriting. N/A', 'The process of sorting and animating with bubble sort is detailed, utilizing global variables i and j within a draw loop to execute one step of the sorting process per frame. N/A', 'The successful completion of the sorting challenge is achieved through the correct implementation of sorting and printing the finished message at the end of the process. N/A']}], 'duration': 482.897, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8241429.jpg', 'highlights': ['Covers visual representation of array in 600x600 window using processing language.', 'Emphasizes manual implementation of sorting algorithm and separate function for swapping values.', 'Details the process of creating and implementing a sorting algorithm with real-time visualization.']}, {'end': 1021.92, 'segs': [{'end': 753.13, 'src': 'embed', 'start': 724.366, 'weight': 0, 'content': [{'end': 725.847, 'text': "It's just traveling across.", 'start': 724.366, 'duration': 1.481}, {'end': 726.847, 'text': 'Hi over there.', 'start': 726.087, 'duration': 0.76}, {'end': 729.389, 'text': 'Oh boy, this is going to take a really long time.', 'start': 726.867, 'duration': 2.522}, {'end': 738.067, 'text': 'How much time do you have? OK, never mind, never mind.', 'start': 731.75, 'duration': 6.317}, {'end': 745.489, 'text': 'I did some calculations, and that was going to take about an hour and 10 minutes, 20 minutes, hour and a half, something like that, to complete.', 'start': 738.087, 'duration': 7.402}, {'end': 748.109, 'text': 'So number one is I could be like, oh, I know.', 'start': 745.849, 'duration': 2.26}, {'end': 753.13, 'text': "Let's just do a little tiny 100 by 100 window.", 'start': 748.469, 'duration': 4.661}], 'summary': 'The travel will take about an hour and 10 minutes to an hour and a half.', 'duration': 28.764, 'max_score': 724.366, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8724366.jpg'}, {'end': 806.002, 'src': 'embed', 'start': 780.597, 'weight': 1, 'content': [{'end': 786.699, 'text': "I mean, I could do the full J each time, but then it's really like a selection sort, which I don't want to do.", 'start': 780.597, 'duration': 6.102}, {'end': 790.54, 'text': "So I'm going to, this is a flawed idea.", 'start': 787.059, 'duration': 3.481}, {'end': 791.4, 'text': "I'm just going to do like 100 per frame.", 'start': 790.56, 'duration': 0.84}, {'end': 796.767, 'text': "So I'm going to add, oh, I can't add it.", 'start': 794.403, 'duration': 2.364}, {'end': 798.209, 'text': "I'm going to do, I'm going to call this N.", 'start': 796.807, 'duration': 1.402}, {'end': 801.395, 'text': "I'm going to just like do this 100 times per frame.", 'start': 798.209, 'duration': 3.186}, {'end': 806.002, 'text': 'Oh, you know what? The print line is something I really should take out here.', 'start': 801.415, 'duration': 4.587}], 'summary': 'Implementing 100 iterations per frame, removing unnecessary print line.', 'duration': 25.405, 'max_score': 780.597, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8780597.jpg'}, {'end': 943.153, 'src': 'heatmap', 'start': 908.026, 'weight': 2, 'content': [{'end': 910.767, 'text': 'And then I have some extra brackets here that are totally unnecessary.', 'start': 908.026, 'duration': 2.741}, {'end': 916.429, 'text': 'All right, this should now visualize a little bit faster.', 'start': 910.807, 'duration': 5.622}, {'end': 917.609, 'text': "Oh, that's kind of nice.", 'start': 916.789, 'duration': 0.82}, {'end': 920.27, 'text': 'There we go.', 'start': 919.47, 'duration': 0.8}, {'end': 923.411, 'text': "Now let's make it bigger.", 'start': 921.85, 'duration': 1.561}, {'end': 927.766, 'text': "Let's make it full screen.", 'start': 926.684, 'duration': 1.082}, {'end': 929.849, 'text': 'Come on, everyone.', 'start': 929.048, 'duration': 0.801}, {'end': 940.151, 'text': "So this is my basic sorting algorithm that is doing a bubble sort, but I'm only visualizing every way all the way through.", 'start': 931.727, 'duration': 8.424}, {'end': 943.153, 'text': "So really in the end, it's kind of like a selection sort visualization.", 'start': 940.191, 'duration': 2.962}], 'summary': 'Visualization of sorting algorithm, showing bubble sort and selection sort.', 'duration': 32.346, 'max_score': 908.026, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8908026.jpg'}, {'end': 1021.92, 'src': 'embed', 'start': 1001.579, 'weight': 3, 'content': [{'end': 1003.039, 'text': 'Make your own beautiful version of this.', 'start': 1001.579, 'duration': 1.46}, {'end': 1005.32, 'text': 'Think about the algorithm a different way.', 'start': 1004.04, 'duration': 1.28}, {'end': 1006.94, 'text': "Think about the data you're sorting a different way.", 'start': 1005.36, 'duration': 1.58}, {'end': 1007.961, 'text': 'Put this on the web.', 'start': 1007.02, 'duration': 0.941}, {'end': 1009.161, 'text': 'Share it with me.', 'start': 1008.581, 'duration': 0.58}, {'end': 1012.982, 'text': 'Sorting Train, hashtag Sorting Train.', 'start': 1010.717, 'duration': 2.265}, {'end': 1014.685, 'text': 'On Twitter, hashtag Sorting Train.', 'start': 1013.282, 'duration': 1.403}, {'end': 1020.798, 'text': "There'll be a link to the TheCodingTrain.com webpage where you also can submit contributions, and I look forward to seeing what you make.", 'start': 1014.705, 'duration': 6.093}, {'end': 1021.92, 'text': 'Okay, thanks for watching.', 'start': 1020.978, 'duration': 0.942}], 'summary': 'Encourage audience to create and share their own sorting algorithms on the web and twitter using #sortingtrain and thecodingtrain.com.', 'duration': 20.341, 'max_score': 1001.579, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH81001579.jpg'}], 'start': 724.366, 'title': 'Visualizing data algorithms', 'summary': 'Covers real-time data visualization with a 400x300 window, aiming for a 1.5-hour reduction, animating a flawed selection sort algorithm with 100 iterations per frame, and exploring bubble sort variations to encourage viewer participation and sharing.', 'chapters': [{'end': 780.577, 'start': 724.366, 'title': 'Real-time data visualization', 'summary': "Discusses the process of real-time data visualization using a window of 400 by 300, aiming to reduce the time to approximately an hour and a half, with the idea of observing the line's progression over time.", 'duration': 56.211, 'highlights': ['Aiming to reduce time to approximately an hour and a half using a 400 by 300 window.', "Considering the idea of observing the line's progression over time.", 'Initial calculations indicated it would take about an hour and 10 minutes to complete.']}, {'end': 880.233, 'start': 780.597, 'title': 'Animating selection sort algorithm', 'summary': 'Discusses the process of animating a flawed idea of implementing a selection sort algorithm by iterating through the array and finding the largest element to place it at the end, aiming to perform 100 iterations per frame.', 'duration': 99.636, 'highlights': ['The process discussed involves animating a flawed idea of implementing a selection sort algorithm by iterating through the array and finding the largest element to place it at the end, aiming to perform 100 iterations per frame.', 'The speaker realizes the flaw in the approach, acknowledging that the current method is essentially a selection sort and considering it a spoiler for the next video.', 'The speaker acknowledges a mistake in the approach, realizing the need to swap elements in addition to finding the largest one, extending the length of the video due to this oversight.']}, {'end': 1021.92, 'start': 880.313, 'title': 'Sorting visualization with bubble sort', 'summary': 'Demonstrates a visualization of a sorting algorithm, initially a bubble sort, and later exploring variations and possibilities, encouraging viewers to create their own versions and share them on social media.', 'duration': 141.607, 'highlights': ['The chapter demonstrates a visualization of a sorting algorithm, initially a bubble sort, and later exploring variations and possibilities. The speaker visualizes a sorting algorithm, initially a bubble sort, and later explores variations like selection sort and different data sorting methods.', 'The speaker encourages viewers to create their own versions of the visualization and share them on social media. Viewers are encouraged to create their own versions of the sorting visualization, think about algorithms and data in different ways, and share their creations on social media using the hashtag #SortingTrain.']}], 'duration': 297.554, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/67k3I2GxTH8/pics/67k3I2GxTH8724366.jpg', 'highlights': ['Aiming to reduce time to approximately an hour and a half using a 400 by 300 window.', 'The process involves animating a flawed selection sort algorithm with 100 iterations per frame.', 'The chapter demonstrates a visualization of a sorting algorithm, initially a bubble sort, and later exploring variations and possibilities.', 'The speaker encourages viewers to create their own versions of the visualization and share them on social media.']}], 'highlights': ['The narrator intends to visualize various sorting algorithms, including the bubble sort, selection sort, and quicksort, and invites suggestions for other advanced algorithms from the audience.', "Drawing inspiration from Mike Bostock's article 'Visualizing Algorithms' from 2014, the narrator plans to visualize the bubble sort algorithm and explore the potential for unique visual representations of sorting processes.", 'The bubble sort algorithm is characterized by a time complexity of O(n^2), making it inefficient for larger arrays.', 'Covers visual representation of array in 600x600 window using processing language.', 'Emphasizes manual implementation of sorting algorithm and separate function for swapping values.', 'Aiming to reduce time to approximately an hour and a half using a 400 by 300 window.', 'The process involves animating a flawed selection sort algorithm with 100 iterations per frame.']}