The document discusses K-means clustering and DBSCAN, two popular clustering algorithms. K-means clusters data by minimizing distances between points and cluster centroids. It works by iteratively assigning points to the closest centroid and recalculating centroids. DBSCAN clusters based on density rather than distance; it identifies dense regions separated by sparse regions to form clusters without specifying the number of clusters.
K Means Clustering Algorithm | K Means Example in Python | Machine Learning A...Edureka!
** Python Training for Data Science: https://www.edureka.co/python **
This Edureka Machine Learning tutorial (Machine Learning Tutorial with Python Blog: https://goo.gl/fe7ykh ) series presents another video on "K-Means Clustering Algorithm". Within the video you will learn the concepts of K-Means clustering and its implementation using python. Below are the topics covered in today's session:
1. What is Clustering?
2. Types of Clustering
3. What is K-Means Clustering?
4. How does a K-Means Algorithm works?
5. K-Means Clustering Using Python
Machine Learning Tutorial Playlist: https://goo.gl/UxjTxm
Hierarchical Clustering | Hierarchical Clustering in R |Hierarchical Clusteri...Simplilearn
This presentation about hierarchical clustering will help you understand what is clustering, what is hierarchical clustering, how does hierarchical clustering work, what is distance measure, what is agglomerative clustering, what is divisive clustering and you will also see a demo on how to group states based on their sales using clustering method. Clustering is the method of dividing the objects into clusters which are similar between them and are dissimilar to the objects belonging to another cluster. It is used to find data clusters such that each cluster has the most closely matched data. Prototype-based clustering, hierarchical clustering, and density-based clustering are the three types of clustering algorithms. Lets us discuss hierarchical clustering in this video. In simple terms, Hierarchical clustering is separating data into different groups based on some measure of similarity.
Below topics are explained in this "Hierarchical Clustering" presentation:
1. What is clustering?
2. What is hierarchical clustering
3. How hierarchical clustering works?
4. Distance measure
5. What is agglomerative clustering
6. What is divisive clustering
7. Demo: to group states based on their sales
Why learn Machine Learning?
Machine Learning is taking over the world- and with that, there is a growing need among companies for professionals to know the ins and outs of Machine Learning
The Machine Learning market size is expected to grow from USD 1.03 Billion in 2016 to USD 8.81 Billion by 2022, at a Compound Annual Growth Rate (CAGR) of 44.1% during the forecast period.
What skills will you learn from this Machine Learning course?
By the end of this Machine Learning course, you will be able to:
1. Master the concepts of supervised, unsupervised and reinforcement learning concepts and modeling.
2. Gain practical mastery over principles, algorithms, and applications of Machine Learning through a hands-on approach which includes working on 28 projects and one capstone project.
3. Acquire thorough knowledge of the mathematical and heuristic aspects of Machine Learning.
4. Understand the concepts and operation of support vector machines, kernel SVM, naive Bayes, decision tree classifier, random forest classifier, logistic regression, K-nearest neighbors, K-means clustering and more.
5. Be able to model a wide variety of robust Machine Learning algorithms including deep learning, clustering, and recommendation systems
We recommend this Machine Learning training course for the following professionals in particular:
1. Developers aspiring to be a data scientist or Machine Learning engineer
2. Information architects who want to gain expertise in Machine Learning algorithms
3. Analytics professionals who want to work in Machine Learning or artificial intelligence
4. Graduates looking to build a career in data science and Machine Learning
Learn more at www.simplilearn.com
This Edureka k-means clustering algorithm tutorial will take you through the machine learning introduction, cluster analysis, types of clustering algorithms, k-means clustering, how it works along with an example/ demo in R. This Data Science with R tutorial is ideal for beginners to learn how k-means clustering work. You can also read the blog here: https://goo.gl/3aseSs
K Means Clustering Algorithm | K Means Example in Python | Machine Learning A...Edureka!
** Python Training for Data Science: https://www.edureka.co/python **
This Edureka Machine Learning tutorial (Machine Learning Tutorial with Python Blog: https://goo.gl/fe7ykh ) series presents another video on "K-Means Clustering Algorithm". Within the video you will learn the concepts of K-Means clustering and its implementation using python. Below are the topics covered in today's session:
1. What is Clustering?
2. Types of Clustering
3. What is K-Means Clustering?
4. How does a K-Means Algorithm works?
5. K-Means Clustering Using Python
Machine Learning Tutorial Playlist: https://goo.gl/UxjTxm
Hierarchical Clustering | Hierarchical Clustering in R |Hierarchical Clusteri...Simplilearn
This presentation about hierarchical clustering will help you understand what is clustering, what is hierarchical clustering, how does hierarchical clustering work, what is distance measure, what is agglomerative clustering, what is divisive clustering and you will also see a demo on how to group states based on their sales using clustering method. Clustering is the method of dividing the objects into clusters which are similar between them and are dissimilar to the objects belonging to another cluster. It is used to find data clusters such that each cluster has the most closely matched data. Prototype-based clustering, hierarchical clustering, and density-based clustering are the three types of clustering algorithms. Lets us discuss hierarchical clustering in this video. In simple terms, Hierarchical clustering is separating data into different groups based on some measure of similarity.
Below topics are explained in this "Hierarchical Clustering" presentation:
1. What is clustering?
2. What is hierarchical clustering
3. How hierarchical clustering works?
4. Distance measure
5. What is agglomerative clustering
6. What is divisive clustering
7. Demo: to group states based on their sales
Why learn Machine Learning?
Machine Learning is taking over the world- and with that, there is a growing need among companies for professionals to know the ins and outs of Machine Learning
The Machine Learning market size is expected to grow from USD 1.03 Billion in 2016 to USD 8.81 Billion by 2022, at a Compound Annual Growth Rate (CAGR) of 44.1% during the forecast period.
What skills will you learn from this Machine Learning course?
By the end of this Machine Learning course, you will be able to:
1. Master the concepts of supervised, unsupervised and reinforcement learning concepts and modeling.
2. Gain practical mastery over principles, algorithms, and applications of Machine Learning through a hands-on approach which includes working on 28 projects and one capstone project.
3. Acquire thorough knowledge of the mathematical and heuristic aspects of Machine Learning.
4. Understand the concepts and operation of support vector machines, kernel SVM, naive Bayes, decision tree classifier, random forest classifier, logistic regression, K-nearest neighbors, K-means clustering and more.
5. Be able to model a wide variety of robust Machine Learning algorithms including deep learning, clustering, and recommendation systems
We recommend this Machine Learning training course for the following professionals in particular:
1. Developers aspiring to be a data scientist or Machine Learning engineer
2. Information architects who want to gain expertise in Machine Learning algorithms
3. Analytics professionals who want to work in Machine Learning or artificial intelligence
4. Graduates looking to build a career in data science and Machine Learning
Learn more at www.simplilearn.com
This Edureka k-means clustering algorithm tutorial will take you through the machine learning introduction, cluster analysis, types of clustering algorithms, k-means clustering, how it works along with an example/ demo in R. This Data Science with R tutorial is ideal for beginners to learn how k-means clustering work. You can also read the blog here: https://goo.gl/3aseSs
Introductory session for basic matlab commands and a brief overview of K-mean clustering algorithm with image processing example.
NOTE: you can find code of k-mean clustering algorithm for image processing in notes.
k-means clustering aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest mean, serving as a prototype of the cluster. This results in a partitioning of the data space into Voronoi cells.
Deep dive into the world of word vectors. We will cover - Bigram model, Skip-gram, CBOW, GLO. Starting from simplest models, we will journey through key results and ideas in this area.
Deep dive into the world of word vectors. We will cover - Bigram model, Skip-gram, CBOW, GLO. Starting from simplest models, we will journey through key results and ideas in this area.
https://www.meetup.com/Deep-Learning-Bangalore/events/239996690/
Machine Learning Foundations for Professional ManagersAlbert Y. C. Chen
20180526@Taiwan AI Academy, Professional Managers Class.
Covering important concepts of classical machine learning, in preparation for deep learning topics to follow. Topics include regression (linear, polynomial, gaussian and sigmoid basis functions), dimension reduction (PCA, LDA, ISOMAP), clustering (K-means, GMM, Mean-Shift, DBSCAN, Spectral Clustering), classification (Naive Bayes, Logistic Regression, SVM, kNN, Decision Tree, Classifier Ensembles, Bagging, Boosting, Adaboost) and Semi-Supervised learning techniques. Emphasis on sampling, probability, curse of dimensionality, decision theory and classifier generalizability.
Mathematics online: some common algorithmsMark Moriarty
Brief overview of some basic algorithms used online and across data-mining, and a word on where to learn them. Prepared specially for UCC Boole Prize 2012.
Slides for the 2016/2017 edition of the Data Mining and Text Mining Course at the Politecnico di Milano. The course is also part of the joint program with the University of Illinois at Chicago.
DBScan stands for Density-Based Spatial Clustering of Applications with Noise.
DBScan Concepts
DBScan Parameters
DBScan Connectivity and Reachability
DBScan Algorithm , Flowchart and Example
Advantages and Disadvantages of DBScan
DBScan Complexity
Outliers related question and its solution.
Lecture 7: Hierarchical clustering, DBSCAN, Mixture models and the EM algorithm (ppt,pdf)
Chapter 8,9 from the book “Introduction to Data Mining” by Tan, Steinbach, Kumar.
Mathematics in the Modern World (Patterns and Sequences).pptxReignAnntonetteYayai
Patterns exist in different variety of forms. The petals of a flower, arrangement of leaves reveals a sequential pattern. Natures are bounded by different colors and shapes – the rainbow mosaic of a butterfly’s wings, the undulating ripples of a desert dune. But these miraculous creations not only delight the imagination, they also challenge our understanding. How do these patterns develop? What sorts of rules and guidelines, shape the patterns in the world around us? Some patterns are molded with a strict regularity. At least superficially, the origin of regular patterns often seems easy to explain. Thousands of times over, the cells of a honeycomb repeat their hexagonal symmetry. The honeybee is a skilled and tireless artisan with an innate ability to measure the width and to gauge the thickness of the honeycomb it builds. Although the workings of an insect's mind may baffle biologists, the regularity of the honeycomb attests to the honey bee's remarkable architectural abilities. A pattern is something which helps us anticipate what we might see or expect to happen next. It may also help us know what may have come before or what we are seeing currently. There are four types of patterns; (1) logic patterns, (2) number patterns, (3) geometric patterns and (4) word patterns. 4. Rippled pattern observed on the desert sand. 5. Honeycomb structure A pattern has symmetry. Isometry of the plane that preserves the pattern. It is a way of transforming the plane that preserves geometrical properties such as length. There are four types of isometries according to Euclidian isometry of plane transformation (1) Translation (2) Reflection (3) Rotation (4) Dilation. Moreover, we have to consider sometimes the combination of Reflection, translation and rotations makes another isometry called rigid transformation which leave the dimensions of the object and its image unchanged. A propositional variable represented by a lowercase or capital letter in the English alphabet denotes an arbitrary proposition with an unspecified truth value. An assertion which contains at least one proposition variable is called a propositional form. In the preposition: “if I study the lesson, Then I will pass the test” In a condition hypothetical proposition, the truth does not rest on the truth of every statement taken singly. Rather, it depends on valid sequence between members of the proposition. In the example given, we don’t assert, “I study the lesson” nor we assert, “I will be able to pass the test”. We ae going to simply declare the fact that the statement “I study the lesson” is dependent on the other statement which is “I will pass the test” and vice versa. Note: The word “then’ as part of the consequent maybe omitted. “IF I study the lesson, I will pass the test” The consequent may also be written ahead of the antecedent and the word “then” is omitted. “I will pass the test, IF I study t
Houston machine learning meetup, two papers are discussed:
- A Contextual-Bandit Approach to Personalized News Article Recommendation
http://rob.schapire.net/papers/www10.pdf
- An efficient bandit algorithm for realtime multivariate optimization
https://www.kdd.org/kdd2017/papers/view/an-efficient-bandit-algorithm-for-realtime-multivariate-optimization
Sr. Architect Pradeep Reddy, from Qubole, presents the state of Data Science in the enterprise industries today, followed by deep dive of an end-to-end real world machine learning use case. We'll explore the best practices and challenges of big data operations when developing new machine learning features and advanced analytics products at scale in the cloud.
Levelwise PageRank with Loop-Based Dead End Handling Strategy : SHORT REPORT ...Subhajit Sahu
Abstract — Levelwise PageRank is an alternative method of PageRank computation which decomposes the input graph into a directed acyclic block-graph of strongly connected components, and processes them in topological order, one level at a time. This enables calculation for ranks in a distributed fashion without per-iteration communication, unlike the standard method where all vertices are processed in each iteration. It however comes with a precondition of the absence of dead ends in the input graph. Here, the native non-distributed performance of Levelwise PageRank was compared against Monolithic PageRank on a CPU as well as a GPU. To ensure a fair comparison, Monolithic PageRank was also performed on a graph where vertices were split by components. Results indicate that Levelwise PageRank is about as fast as Monolithic PageRank on the CPU, but quite a bit slower on the GPU. Slowdown on the GPU is likely caused by a large submission of small workloads, and expected to be non-issue when the computation is performed on massive graphs.
Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
5. INTRODUCTION
• K-means (MacQueen, 1967) is one of the simplest
unsupervised learning algorithms that solve the well known
clustering problem.
• The main idea is to define k centroids, one for each
cluster.
6. • Input
• M(set of points)
• k(number of clusters)
• Output
• μ_1 , …, μ_k (cluster centroids)
• k-Means clusters the M point into K clusters by minimizing the
squared error function
μ
18. K-MEANS IN PRACTICE
• How to choose initial centroids
• select randomly among the data points
• generate completely randomly
• How to choose k
• study the data
• run k-Means for different k (measure squared error for each k)
• Run k-means many times!
• Get many choices of initial points
20. QUESTIONS
• Euclidean distance results in spherical clusters
• What cluster shape does the Manhattan distance give?
• Think of other distance measures. What cluster shapes
will those yield?
22. DENSITY-BASED SPATIAL CLUSTERING OF APPLICATION
WITH NOISE
• DBSCAN is a Density-Based Clustering algorithm
• In density based clustering we partition points into dense regions separated
by not-so-dense regions.
• Important Questions:
• How do we measure density and what is a dense region?
• DBSCAN:
• Density at point p: number of points within a circle of radius Eps
• Dense Region: A circle of radius Eps that contains at least MinPts points
31. DETERMINING EPS & MINPTS
• Idea is that for points in a cluster, their kth nearest neighbors
are at roughly the same distance
• Noise points have the kth nearest neighbor at farther distance
• So, plot sorted distance of every point to its kth nearest
neighbor
• Find the distance d where there is a “knee” in the curve
• Eps = d, MinPts = k
36. DISTANCE METRIC FOR DOCUMENTS
• Motivations
• Identical – easy
• Modified or related (Ex: DNA, Plagiarism, Authorship)
• Did Francis Bacon write Shakespeare’s plays
39. DOCUMENT REPRESENTATION
• Word count document representation
• Bag of words model
• Ignore order of words
• Count # of instances of each word in vocabulary
40. EXAMPLE
• Word: Sequence of alphanumeric characters. For example, the phrase “6.006
is fun” has 4 words.
• Word Frequencies: Word frequency D(w) of a given word w is the number of
times it occurs in a document D.
• For example, the words and word frequencies for the above phrase are as
below: Word 6 The Is 006 Easy Fun
Count 1 0 1 1 0 1
42. METRIC
• Inner product of the vectors D1 andD2 containing the word frequencies
for all words in the 2 documents. Equivalently, this is the projection of
vectors D1 onto D2 or vice versa. Mathematically this is expressed as:
D1 ·D2 = ∑ D1(w) .D2(w)
• Angle Metric: The angle between the vectors D1 and D2 gives an
indication of overlap between the 2 documents. Mathematically this
angle is expressed as:
θ(D1,D2) = arccos (
𝐷1.𝐷2
| 𝐷1 |∗| 𝐷2 |
)