Feed: SAS Blogs. Author: Leonid Batkhan. Have you ever thought of selling sand on the beach? Neither have I. To most people the mere idea is preposterous. But isn’t it how all great discoveries and inventions are made? Someone comes up with an outwardly crazy, outlandish idea, and despite all the skepticism, criticism, ostracism, ridicule and many attempts and failures, finally succeeds making the rest of us look like fools for not being able to appreciate, accept and embrace it at the very beginning. And the world moves a notch forward. We are all captives to our own stereotypes. It ... Read More

Feed: Blog – ArangoDB. Author: Claudius Weinberger. We are super excited to share the great news of two highly-experienced minds joining team ArangoDB to shape and grow the multi-model vision with us. Matt Ekstrom is an accomplished enterprise sales leader and joins ArangoDB as Chief Revenue Officer. He brings over 20 years of sales and leadership experience with him and will lead our global sales efforts from San Francisco. Our new Head of Engineering & Machine Learning is Jörg Schad who brings nearly a decade of experience of researching, designing and developing distributed systems and machine learning pipelines to our ... Read More

Feed: R-bloggers. Author: R Views. [This article was first published on R Views, 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. In a previous post, we explored the dividend history of stocks included in the SP500, and we followed that with exploring the dividend history of some NASDAQ tickers. Today’s post is a short continuation of that tech dividend theme, with the aim of demonstrating how we can take our previous work and ... Read More

Feed: R-bloggers. Author: Jan Fischer. A major problem arises when comparing forecasting methods and models across different time series. This is a challenge we regularly face at STATWORX. Unit dependent measures like the MAE (Mean Absolute Error) and the RMSE (Root Mean Squared Error) turn out to be unsuitable and hardly helpful if the time series is measured in different units. However, if this is not the case, both measures provide valuable information. The MAE is perfectly interpretable as it embodies the average absolute deviation from the actual values. The RMSE, on the other hand, is not that easy to ... Read More

Feed: Planet PostgreSQL. Windowing functions and analytics have been around for quite some time and many people already make use of this awesome stuff in the PostgreSQL world. Timeseries  are an especially important area in this context. However, not all features have been widely adopted and thus many developers have to implement functionality at the application level in a painful way instead of just using some of the more advanced SQL techniques.The idea of this blog is to demonstrate some of the advanced stuff so that more people out there can make use of PostgreSQL’s true power.Preparing data for analyticsFor ... Read More

Feed: Planet MySQL; Author: Monyog; Author: Robert AgarTuning database performance is a complicated task that can be a thorn in the side of the database team. There are many interconnected components and environmental aspects that come under consideration when attempting to optimize the performance of your database systems. A DBA can be hard-pressed to determine where to begin their optimization efforts. An initial investigation may concentrate on the network and hardware on which the database is running. These inquiries may uncover issues that can be easily identified and addressed. It may be a simple matter of adding some disk space ... Read More

Feed: Planet MySQL; Author: Severalnines; Complex, inflexible architectures, redundancy and out-of-date technology, are common problems for companies facing data to cloud migration.  We look to the “clouds,” hoping that we will find there a magic solution to improve operational speed and performance, better workload and scalability, less prone and less complicated architectures. We hope to make our database administrator's life more comfortable. But is it really always a case?  As more enterprises are moving to the cloud, the hybrid model is actually becoming more popular. The hybrid model is seen as a safe model for many businesses.  In fact, it's ... Read More

Feed: Planet MySQL; Author: Percona Community; Geoff Winans  | August 14, 2019 |  Posted In: MariaDB, MySQL, ToolsIn my roles as a DBA at various companies, I generally found the tooling to be quite lacking. Everything from metrics collection, alerting, backup management; they were either missing, incomplete or implemented poorly. DBA-Tools was born from a desire to build backup tools that supported my needs in smaller/non-cloud environments. As BASH is easily the most common shell available out there on systems running MySQL® or MariaDB®, it was an easy choice.How DBA-Tools came to beWhile rebuilding my home-lab two years ago, I decided I ... Read More

Feed: R-bloggers. Author: Andrew Treadway. This post will discuss ways of handling huge numbers in R using the gmp package. The gmp package The gmp package provides us a way of dealing with really large numbers in R. For example, let’s suppose we want to multiple 10250 by itself. Mathematically we know the result should be 10500. But if we try this calculation in base R we get Inf for infinity. num = 10^250 num^2 # Inf However, we can get around this using the gmp package. Here, we can convert the integer 10 to an object of the bigz ... Read More

Feed: R-bloggers. Author: arthur charpentier. At the Summer School of the Swiss Association of Actuaries, in Lausanne, I will start talking about networks and insurance this Friday. Slides are available online Related If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook ... Read More