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Statistical Learning


Origins and genetic legacy of prehistoric dogs

Science

Dogs were the first domesticated animal, likely originating from human-associated wolves, but their origin remains unclear. Bergstrom et al. sequenced 27 ancient dog genomes from multiple locations near to and corresponding in time to comparable human ancient DNA sites (see the Perspective by Pavlidis and Somel). By analyzing these genomes, along with other ancient and modern dog genomes, the authors found that dogs likely arose once from a now-extinct wolf population. They also found that at least five different dog populations ∼10,000 years before the present show replacement in Europe at later dates. Furthermore, some dog population genetics are similar to those of humans, whereas others differ, inferring a complex ancestral history for humanity's best friend. Science , this issue p. [557][1]; see also p. [522][2] Dogs were the first domestic animal, but little is known about their population history and to what extent it was linked to humans. We sequenced 27 ancient dog genomes and found that all dogs share a common ancestry distinct from present-day wolves, with limited gene flow from wolves since domestication but substantial dog-to-wolf gene flow. By 11,000 years ago, at least five major ancestry lineages had diversified, demonstrating a deep genetic history of dogs during the Paleolithic. Coanalysis with human genomes reveals aspects of dog population history that mirror humans, including Levant-related ancestry in Africa and early agricultural Europe. Other aspects differ, including the impacts of steppe pastoralist expansions in West and East Eurasia and a near-complete turnover of Neolithic European dog ancestry. [1]: /lookup/doi/10.1126/science.aba9572 [2]: /lookup/doi/10.1126/science.abe7823


How is machine learning different from AI and data science?- Edvancer Eduventures

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In this blog post, I will explain how machine learning fits into the broader landscape of data and computer science. This means understanding how machine learning interrelates with parent fields and sister disciplines. This is important, as these are the terms you will see time and again when searching for relevant study materials and hear mentioned ad nauseam in machine learning books. Relevant disciplines can also be difficult and confusing to tell apart at first glance, such as'machine learning' and'data mining.' The lineage of machine learning can be understood by first examining its forefathers.


Imbalanced-learn: Handling imbalanced class problem

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In the previous article here, we have gone through the different methods to deal with imbalanced data. In this article, let us try to understand how to use imbalanced-learn library to deal with imbalanced class problems. We will make use of Pycaret library and UCI's default of credit card client dataset which is also in-built into PyCaret. Imbalanced-learn is a python package that provides a number of re-sampling techniques to deal with class imbalance problems commonly encountered in classification tasks. Note that imbalanced-learn is compatible with scikit-learn and is also part of scikit-learn-contrib projects.


Why it's Super Hard to be an ML Researcher or Developer?

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A few months ago, I came across this true story of a Harvard professor of political science, Gary King, who started working on the document clustering problem to give a Festschrift (a collection of writings published in honor of a scholar) to one of his colleagues, as the retirement gift. To do so, he asked his grad students to utilize every clustering algorithm ever invented. For those who know about this, clustering is a very old problem in the field of machine learning and statistics. Hence, there were plenty of methods available to apply in the literature, and they found around 250 algorithms. To compare the efficiency of all the algorithms, they coded an R package and what did they found?


An Introduction to AI, updated - KDnuggets

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We provide an introduction to key concepts and methods in AI, covering Machine Learning and Deep Learning, with an updated extensive list that includes Narrow AI, Super Intelligence, and Classic Artificial Intelligence, as well as recent ideas of NeuroSymbolic AI, Neuroevolution, and Federated Learning.


15 Best Machine Learning (ML) Books for 2020

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Artificial Intelligence (AI) and Machine Learning (ML) technologies have become key innovation accelerators for organizations looking for that extra edge. Machine Learning books are a great starting point for enthusiasts who want to transition to these in-demand roles. In this article we list down top machine learning books to get you started on ML journey. The increased usage of machine learning in enterprises has driven up the need for skilled professionals. Machine learning models serve up Netflix recommendations, Facebooks News Feed leverages machine learning to drum up personalized content, and Twitter utilizes machine learning to rank tweets and boost engagements.


Mastering Python for Data Science - Programmer Books

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Data science is a relatively new knowledge domain which is used by various organizations to make data driven decisions. Data scientists have to wear various hats to work with data and to derive value from it. The Python programming language, beyond having conquered the scientific community in the last decade, is now an indispensable tool for the data science practitioner and a must-know tool for every aspiring data scientist. Using Python will offer you a fast, reliable, cross-platform, and mature environment for data analysis, machine learning, and algorithmic problem solving. This comprehensive guide helps you move beyond the hype and transcend the theory by providing you with a hands-on, advanced study of data science.


Artificial Intelligence with Python Primer Concept

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Artificial Intelligence with Python Primer Concept - Learn Artificial Intelligence With Python in simple and easy steps starting from basic to advanced concepts with examples including Primer Concept, Getting Started, Machine Learning, Data Preparation, Supervised Learning: Classification, Supervised Learning: Regression, Logic Programming, Unsupervised Learning: Clustering, Performance Considerations, Natural Language Processing, NLTK Package, Analyzing Time Series Data, Speech Recognition, Heuristic Search, Gaming, Neural Networks, Reinforcement Learning, Genetic Algorithms, Computer Vision, Deep Learning.


zomato digitizes menus using Amazon Textract and Amazon SageMaker

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This post is co-written by Chiranjeev Ghai, ML Engineer at zomato. zomato is a global food-tech company based in India. Are you the kind of person who has very specific cravings? Maybe when the mood hits, you don’t want just any kind of Indian food—you want Chicken Chettinad with a side of paratha, and nothing […]


Logistic Regression in Python

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Logistic Regression is used for classification problems in machine learning. It is used to deal with binary classification and multiclass classification. In logistic regression, the target variable/dependent variable should be a discrete value or categorical value. Binary classification problems with two class values like male/female, yes/no, True/False, 0/1, pass/fail. Let's learn about logistic regression for binary classification in this story.