Tag: Library

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: 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: Daniel Oehm. If you’re like me, when running a process through a loop you’ll add in counters and progress indicators. That way you’ll know if it will take 5 minutes or much longer. It’s also good for debugging to know when the code wigged-out. This is typically what’s done. You take a time stamp at the start – start , print out some indicators at each iteration – cat(“iteration”, k, “// reading file”, file, “n”) and print out how long it took at the end – print(Sys.time()-start). The problem is it will print out a new line ... Read More

Feed: Planet MySQL; Author: Michael McLaughlin; There was an option during the Fedora 30 Workstation installation to add the Apache Web Server, but you need to set it to start automatically. Unfortunately, there was no option to install PHP, which I thought odd because of how many web developers learn the trade first on PHP with a LAMP (Linux, Apache, MySQL, Perl/PHP/Python) stack. You see how to fix that shortcoming in this post and how to install and test PHP, mysqli, and pdo to support MySQL 8. Before you do that make sure you install MySQL 8. You can find ... Read More

Feed: CronJ. Author: Vignesh M; Everyone’s familiar with JavaScript the most popular programming language used as a client-side development tool in 95 percent of websites. But what about server-side programming? Well, with the introduction of Node.JS, JavaScript has become an all-purpose full stack development language. While Angular, React and Vue are Front-end Frameworks / Libraries, Node is the one and only Javascript based Back-end framework. So, let’s discuss what Node.JS is and then explore its advantages and disadvantages. CronJ NodeJSNode.JS is an open-source runtime environment for JavaScript. It’s based on Chrome v8, an engine for chromium browsers. Node.JS allows your ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: leonardo mattes. Recommender systems are applied in a variety of industries such as e-commerce, streaming services and others. There are two major techniques used in Recommender systems,  collaborative filtering and Content-based filtering. This article presents five  “Jupyter” NoteBooks which construct a large scale recommender system based on a collaborative filter using  Spark FrameWork SVD, and another using Amazon Sage Maker  AutoEncode. The dataset used has more than  28 million user ratings. In this article the  final results of the two techniques are shown and compared and Spark SVD brings better results.  ... Read More

Feed: Planet MySQL; Author: Frederic Descamps; Answering this question is not easy. Like always, the best response is “it depends” ! But let’s try to give you all the necessary info the provide the most accurate answer. Also, may be fixing one single query is not enough and looking for that specific statement will lead in finding multiple problematic statements. The most consuming one The first candidate to be fixed is the query that consumes most of the execution time (latency). To identify it, we will use the sys schema and join it with events_statements_summary_by_digest from performance_schemato retrieve a real ... Read More

Feed: R-bloggers. Author: AbdulMajedRaja RS. In this post, We’re simply going to see 5 tricks that could help improve your tooling using {tidyverse}. Create a difference variable between the current value and the next value This is also known as lead and lag – especially in a time series dataset this varaible becomes very important in feature engineering. In Excel, This is simply done by creating a new formula field and subtracting the next cell with the current cell or the current cell with the previous cell and dragging the cell formula to the last cell. Let’s take our {fakir} ... Read More

Feed: Planet MySQL; Author: MySQL Performance Blog; Percona announces the release of Percona Server for MySQL 8.0.16-7 on August 15, 2019 (downloads are available here and from the Percona Software Repositories).This release is based on MySQL 8.0.16. It includes all bug fixes in these releases. Percona Server for MySQL 8.0.16-7 is now the current GA release in the 8.0 series. All of Percona’s software is open-source and free.Percona Server for MySQL 8.0.16 includes all the features available in MySQL 8.0.16 Community Edition in addition to enterprise-grade features developed by Percona. For a list of highlighted features from both MySQL 8.0 and Percona ... Read More

Feed: Recent Announcements. Amazon Kinesis Data Streams has changed the license of the Amazon Kinesis Producer Library from the Amazon Software License to Apache License 2.0. This change allows you to easily build and integrate the Amazon Kinesis Producer Library with other Apache software projects such as Apache Flink and Apache Spark.  ... Read More