Statistical Learning
On Learning High Dimensional Structured Single Index Models
Rao, Nikhil, Ganti, Ravi, Balzano, Laura, Willett, Rebecca, Nowak, Robert
Single Index Models (SIMs) are simple yet flexible semi-parametric models for machine learning, where the response variable is modeled as a monotonic function of a linear combination of features. Estimation in this context requires learning both the feature weights and the nonlinear function that relates features to observations. While methods have been described to learn SIMs in the low dimensional regime, a method that can efficiently learn SIMs in high dimensions, and under general structural assumptions, has not been forthcoming. In this paper, we propose computationally efficient algorithms for SIM inference in high dimensions with structural constraints. Our general approach specializes to sparsity, group sparsity, and low-rank assumptions among others. Experiments show that the proposed method enjoys superior predictive performance when compared to generalized linear models, and achieves results comparable to or better than single layer feedforward neural networks with significantly less computational cost.
Introduction to Machine Learning for Developers
Today's developers often hear about leveraging machine learning algorithms in order to build more intelligent applications, but many don't know where to start. One of the most important aspects of developing smart applications is to understand the underlying machine learning models, even if you aren't the person building them. Whether you are integrating a recommendation system into your app or building a chat bot, this guide will help you get started in understanding the basics of machine learning. This introduction to machine learning and list of resources is adapted from my October 2016 talk at ACT-W, a women's tech conference. While this is only a brief definition, machine learning means we can use statistical models and probabilistic algorithms to answer questions so we can make informative decisions based on our data.
The Experience of Being a High-Performing Data Scientist
The experience of being a working data scientist is not necessarily what people think. A profession that some regard as "sexy" is, more often than not, a difficult job involving long hours, tight budgets, limited staff, daunting tasks, shifting requirements, endless meetings, and inflated expectations. For the working data scientist, pain points may dominate the fabric of their experience. High-performance data scientists are those who automate, accelerate, and streamline the more tedious aspects of their jobs so that they can focus on finding data-driven insights. They will embrace any tool, platform, or approach that can help free up mental bandwidth for tasks that demand their creativity and judgment.
Spark: Big Data Cluster Computing in Production: 9781119254010: Computer Science Books @ Amazon.com
Spark's popularity means the field is expanding in terms of both use and capability. Faster than Hadoop and MapReduce, but compatible with Java, Scala, Python, and R, this open source clustering framework is becoming a must-have skill. Spark: Big Data Cluster Computing in Production goes beyond the basics to show you how to bring Spark to real-world production environments. With expert instruction, real-life use cases, and frank discussion, this guide helps you move past the challenges and bring proof-of-concept Spark applications live.
Can we predict flu deaths with Machine Learning and R?
Among the many R packages, there is the outbreaks package. It contains datasets on epidemics, on of which is from the 2013 outbreak of influenza A H7N9 in China, as analysed by Kucharski et al. (2014): I will be using their data as an example to test whether we can use Machine Learning algorithms for predicting disease outcome. Disclaimer: I am not an expert in Machine Learning. Everything I know, I taught myself. So, if you identify any mistakes or have tips and tricks for improvement, please don't hesitate to let me know!
Training: Introduction to Machine Learning and Data Mining
Machine learning automatically recognizes complex, previously unknown, novel, and useful patterns and information in all types of data. Data driven algorithms are the wave of the future and their results improve as the amount of data increases. Machine learning algorithms are used in search engines, image analysis, multimedia database retrieval, bioinformatics, industrial automation, speech recognition, and many other fields. This survey course covers the concepts and principles of a large variety of data mining methods, equips you with a working knowledge of these techniques and prepares you to apply them to real problems. The statistical programming language R is used to implement machine learning algorithms.
16 analytic disciplines compared to data science
What are the differences between data science, data mining, machine learning, statistics, operations research, and so on? Here I compare several analytic disciplines that overlap, to explain the differences and common denominators. Sometimes differences exist for nothing else other than historical reasons. Sometimes the differences are real and subtle. I also provide typical job titles, types of analyses, and industries traditionally attached to each discipline. Underlined domains are main sub-domains. It would be great if someone can add an historical perspective to my article. First, let's start by describing data science, the new discipline. Job titles include data scientist, chief scientist, senior analyst, director of analytics and many more.
Predicting the Higgs-Boson Signal
The Higgs Boson is a landmark discovery that will help us to understand the basic nature of the universe. It was discovered first by the ATLAS experiment at the Large Hadron Collider, CERN in 2012. The Higg's Boson decays into two tau particles giving rise to a small signal buried in background noise. The goal of the Higgs Boson Machine Learning Challenge was to classify the characterizing events detected by ATLAS into "tau tau decay of a Higgs boson" versus "background." First step was to analyze the data and look for Missingness in the data. We found that the missing columns have some interesting pattern and they depend on the columns "PRI_jet_column", which is the number of jets having integer values of 0,1,2, or 3 where larger values has been caped at 3. The Jets are the experimental signatures of quarks and gluons produced in high-energy processes such as head-on proton-proton collisions. For PRI_jet_column 0, there were 10 columns having NULL values (-999), these are the columns which describe the Jet when it is equal to 0. For example, "DER_mass_jet_jet", the invariant mass (20) of the two jets (undefined if PRI jet num 1).So, it does not make sense to take into account the attributes of the jet(s), since they don't exist. For "PRI_jet_column" 1, there were 7 columns having NULL values and they describe the jets when their number is 2, So we deleted these 7 columns. For "PRI_jet_column" 2 or 3, we did not delete any columns.
Bethe Projections for Non-Local Inference
Vilnis, Luke, Belanger, David, Sheldon, Daniel, McCallum, Andrew
Many inference problems in structured prediction are naturally solved by augmenting a tractable dependency structure with complex, non-local auxiliary objectives. This includes the mean field family of variational inference algorithms, soft- or hard-constrained inference using Lagrangian relaxation or linear programming, collective graphical models, and forms of semi-supervised learning such as posterior regularization. We present a method to discriminatively learn broad families of inference objectives, capturing powerful non-local statistics of the latent variables, while maintaining tractable and provably fast inference using non-Euclidean projected gradient descent with a distance-generating function given by the Bethe entropy. We demonstrate the performance and flexibility of our method by (1) extracting structured citations from research papers by learning soft global constraints, (2) achieving state-of-the-art results on a widely-used handwriting recognition task using a novel learned non-convex inference procedure, and (3) providing a fast and highly scalable algorithm for the challenging problem of inference in a collective graphical model applied to bird migration.
Quantum Machine Learning
Biamonte, Jacob, Wittek, Peter, Pancotti, Nicola, Rebentrost, Patrick, Wiebe, Nathan, Lloyd, Seth
Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge MA 02139 USA Recent progress implies that a crossover between machine learning and quantum information processing benefits both fields. Traditional machine learning has dramatically improved the benchmarking and control of experimental quantum computing systems, including adaptive quantum phase estimation and designing quantum computing gates. On the other hand, quantum mechanics offers tantalizing prospects to enhance machine learning, ranging from reduced computational complexity to improved generalization performance. The most notable examples include quantum enhanced algorithms for principal component analysis, quantum support vector machines, and quantum Boltzmann machines. Progress has been rapid, fostered by demonstrations of midsized quantum optimizers which are predicted to soon outperform their classical counterparts. Further, we are witnessing the emergence of a physical theory pinpointing the fundamental and natural limitations of learning. Here we survey the cutting edge of this merger and list several open problems. Machine learning has fundamentally changed the way humans interact with and relate to data. Applications range from self-driving cars to intelligent agents capable of exceeding the best humans at Jeopardy and Go. These applications exhibit large data sets and push current algorithms and computational resources to their limit. Information is fundamentally governed by the laws of physics. The laws are quantum mechanical at the scales of present day information processing technology, in contrast to the more familiar'classical' physics at the human scale. The interface of quantum physics and machine learning naturally goes both ways: machine learning algorithms find application in understanding and controlling quantum systems and, on the other hand, quantum computational devices promise enhancement of the performance of machine learning algorithms for problems beyond the reach of classical computing.