Tag: INDEX

Feed: R-bloggers. Author: R on Dominic Royé. [This article was first published on R on Dominic Royé, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. A disadvantage of choropleth maps is that they tend to distort the relationship between the true underlying geography and the represented variable. It is because the administrative divisions do not usually coincide with the geographical reality where people live. Besides, large areas appear to have a weight that ... Read More

Feed: Planet PostgreSQL. In this post I will show you how I discovered that the backend was putting data into a new table (generate_plist) but the website was still using the ports.pkg_plist column. The result was stale data being shown on the website (for older ports) or no data at all (for newer ports). How long? Since Oct 2017, because that’s when configure_plist showed up on the website. Nobody noticed until recently. I can only guess that I made the backend changes with intent to change the frontend later. I should have created myself a ticket. Why was the change ... Read More

Feed: Journey to AI Blog; Author: Mehrnoosh Vahdat, PhD.; The collaboration of the IBM Data Science and AI Elite (DSE) with Rolls-Royce continues to yield significant results for the Emergent Alliance. This not-for-profit alliance supports innovation and resilience as organizations move toward a post-COVID-19 future. The team’s first project involved creating a risk-pulse index to help governments understand the impact of COVID-19 on several aspects of the economy. The IBM and Rolls-Royce team pressed on developing analytics tools to help policymakers better understand the data used to shape strategies in response to COVID-19. They aimed to provide further insights to ... Read More

Feed: Planet MySQL; Author: Dave Stokes;  Is MySQL going invisible?  Invisible Indexes were included in MySQL 8.0 and now with version 8.0.23 we have Invisible Columns.Indexes You Can Not See!The value of the invisible index is that it allows you to make an index disappear from the view of the optimizer.  In the distant days before 8.0, you would often delete an index you were pretty much definitively positive nobody or no query was using.  And then you would find out that yes, not only was that index you just deleted necessary to everyone in the galaxy (but maybe you)  ... Read More

Feed: Redis Labs. Author: Steve Naventi. With the launch of version 2.0, the RediSearch in-memory index for Redis is over twice as fast as its previous iteration and offers additional ways to makes it easier for developers to create and exploit indices. Built by Redis Labs, RediSearch is a secondary index on top of Redis that eliminates internal data structures to increase responsiveness as well as make it easier for developers to harness advanced tasks such as multifield queries, aggregation and full-text search capabilities like exact phrase matching and numeric filtering for text queries. In addition to a purported maximum ... Read More

Feed: R-bloggers. Author: Tony Hirst. Last night I started wondering about ways in which I might be able to use signal processing (Fourier analysis) or symbol dynamics (eg Thinks: Symbolic Dynamics for Categorising Rally Stage Wiggliness?) to help categorise the nature of rally stage twistiness. Over a morning coffee break, I reminded myself of spectrograms, graphical devices that chunk a time series into a sequence of steps, and than display a frequency plot of each part. Which got me wondering: could I use a spectrogram to segment a stage route and analyse the spectrum of some signal taken along the route ... Read More

Feed: Journey to AI Blog; Author: Kunal Sawarkar; Connecting people with the planet The stakes for our planet couldn’t be higher. A UN report shows while the human population doubled in just the past 50 years, we lost about three-quarters of the land-based environment and about 66% of the marine environment. In other words, our generation is living with merely 25% of the earth’s natural habitat compared to that of our predecessors. And it’s getting worse every day with plastics destroying rivers and oceans and chemicals decimating bee populations and emissions suffocating the air. We are going through the 5th ... Read More

Feed: Radar. Author: Mike Loukides. For a short month, a lot happened in February–perhaps because the US elections are behind us, perhaps because COVID case numbers are dropping, perhaps for any number of reasons. Some of the most interesting articles I’ve seen have been about the Internet of Things, ranging from wireless peas to Elon Musk’s neural interfaces. AI and ML An AI system is being used to train crisis counsellors. Roleplaying plays a critical part in training staff at suicide prevention services. The AI plays the patient, freeing staff so that they can spend more time helping clients, rather ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Alaa Mahjoub. In many cases, for an enterprise to build its digital business technology platform, it must modernize its traditional data and analytics architecture. A modern data and analytics platform should be built on a services-based principles and architecture. Introduction part 1, provided a conceptual-level reference architecture of a traditional Data and Analytics (D&A) platform. This part, provide a conceptual-level reference architecture of a modern D&A platform. Parts 3 and 4, will explain how these two reference architectures can be used to modernize an existing traditional D&A platform. This will be ... Read More

Feed: R-bloggers. Author: R on OSM. [This article was first published on R on OSM, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. We start a new series on neural networks and deep learning. Neural networks and their use in finance are not new. But are still only a fraction of the research output. A recent Google scholar search found only 6% of the articles on stock price price forecasting discussed neural networks ... Read More