This is part of a new series of articles: once or twice a month, we post previous articles that were very popular when first published. These articles are at least 6 month old but no more than 12 month old. The previous digest in this series was posted here a while back. 

18 Great Blogs Posted in the last 12 Months…

Summary:  Count yourself lucky if you’re not in one of the regulated industries where regulation requires you to value interpretability over accuracy.  This has been a serious financial weight on the economy but innovations in Deep Learning point a way out.

As Data Scientists we tend to take as gospel that more accuracy is better.  There…

In the previous post, "Why Ontologies", we explored concepts at a very high level about what an ontology is, and how they can be used in AI, NLP, data integration, and knowledge management applications. So what does the picture of satellites orbiting the earth have to do with…

Linear Model better known as linear regression is one of the most common and flexible analysis framework to identify relationship between two or more variables. The widely used linear model is represented by drawing the best fit line through a series of data points represented on a scatter plot. 

For any budding business analyst this should be the starting point to understand how model works at the very core of its design.

Selecting the Variables in Deducer…

Guest blog post by Rubens Zimbres, PhD.

This article brings images from my work modeling with Mathematica, my experience as a Business Analyst and also my doctorate lessons. For me, the borders between a properly executed Business Intelligence and Data Science (with substantive knowledge in Management) are fuzzy. 

What is a Data Scientist ? In my understanding, someone…

Here is an update from Zacharias Voulgaris, Data Science Author, Video Producer, and Acquisitions Consultant. The message below is from Zacharias.



1. Produced Videos for O'Reilly Safari on Data Science, Programming Languages, and AI



I have a bunch of videos now live on topics including; becoming a data scientist, artificial Intelligence, and which…

Here are just a few featured listings in our new section:

• Boot Camp - Springboard
• Consultant - Mike Allen
• Data Sets - DataBake

View all listings here. …

Managing your relationships with customers, suppliers, and partners and constantly improving their experience is a proven way to build a sustainable and profitable business, and contrary to popular assumption, this doesn’t apply to B2C businesses only. With…

After posting Machine Learning Summarized in One Picture, here is a picture for data science:

I tried to find the source for this picture, but could not. I've found it on LinkedIn, posted by …

I listened once to an old professor talking about working out factorial ANOVA and multiple regression on paper, back in the day. He described a whole room full of papers, all in a particular order, every sum contributing to the next sum and if you got one number wrong the whole thing would be wrong and you'd have to start over. Adding machines made it go quicker, and when punch-card mainframes came they were, well, frustrating at times -- lots of graphic and emotional stories there! -- but…

In this post, we consider different approaches for time series modeling. The forecasting approaches using linear models, ARIMA alpgorithm, XGBoost machine learning algorithm are described. Results of different model combinations are shown. For probabilistic modeling the approaches using copulas and Bayesian inference are considered.

INTRODUCTION

Time series analysis, especially forecasting, is an important problem of modern…

It isn’t too unusual for surveys to contain open-ended questions:  respondents would be free to enter their comments in any manner.  More on an operational basis, not surveys but rather client systems might hold such comments; and not the respondents themselves but customer service agents would be responsible for entering the information.  These same agents would likely classify the nature of the exchange or comments maybe using drop-down menu choices, radials, and check-boxes.  One approach…

Monday newsletter published by Data Science Central. Previous editions can be found here.  The contribution flagged with a + is our selection for the picture of the week.

Featured Resources and Technical Contributions

• Timestamp Data Visualization by…

If you've been struggling to get useful results from big data, you're not alone. The buzz has been that any company not doing analytics is behind the times. But big data even has been a challenge in itself. Perhaps small data is the answer.

What is Big…

This resource is part of a series on specific topics related to data science: regression, clustering, neural networks, deep learning, Hadoop, decision trees, ensembles, correlation, ouliers, regression Python, R, Tensorflow, SVM, data reduction, feature selection, experimental design, time series, cross-validation, model fitting, and many more. To keep receiving these articles, …

Contributed by Yannick Kimmel. He  is currently in the NYC Data Science Academy …

The Internet of Things (IoT) is changing our world. This may seem like a bold statement, but consider the impact this revolutionary technology has already had on communications, education, manufacturing, science, business, and many other fields of life. Clearly, the IoT is moving really fast from concept to reality and transforming how industries…

Long title: The Goal-Question-Metric (GQM) Model to Transform Business Data into an Enterprise Asset.

Today, digitization is dramatically changing the business landscape, and many progressive organizations have started to treat data as a valuable business asset. While many enterprises are investing in improved data management, only a…

When dealing with time series, the first step consists in isolating trends and periodicites. Once this is done, we are left with a normalized time series, and studying the auto-correlation structure is the next step, called model fitting. The purpose is to check whether the underlying data follows some well known stochastic process with a similar auto-correlation structure, such as ARMA processes, using tools such as…