Tag: Twitter

Feed: R-bloggers. Author: Shige. The cyphr package seems to provide a good choice for small research group that shares sensitive data over internet (e.g., DropBox). I did some simple experiment myself and made sure it can actually serve my purpose. I did my experiment on two computers (using openssl): I created the test data on my Linux workstation running Manjaro then I tried to access the data on a Windows 7 laptop. For creating the data (Linux workstation): library(cyphr)# Create the test datadata_dir dir.create(data_dir)dir(data_dir)# Encrypt the test datacyphr::data_admin_init(data_dir)key filename cyphr::encrypt(saveRDS(iris, filename), key)dir(data_dir)# Cannot read the data with decrypting itreadRDS(filename)# Read ... Read More

Feed: R-bloggers. Author: Greg Wilson. We received almost 400 applications for our 2019 internship program from students with very diverse backgrounds. After interviewing several dozen people and making some very difficult decisions, we are pleased to announce that these twelve interns have accepted positions with us for this summer: Therese Anders: Calibrated Peer Review. Prototype tools to conduct experiments to see whether calibrated peer review is a useful and feasible feedback strategy in introductory data science classes and industry workshops. (mentor: Mine Çetinkaya-Rundel) Malcolm Barrett: R Markdown Enhancements. Tidy up and refactoring the R Markdown code base. (mentor: Rich Iannone) ... Read More

Feed: R-bloggers. Author: Bob Carpenter. First some background, then the bad news, and finally the good news. Spoiler alert: The bad news is that exploring the posterior is intractable; the good news is that we don’t need to explore all of it. Sampling to characterize the posterior There’s a misconception among Markov chain Monte Carlo (MCMC) practitioners that the purpose of sampling is to explore the posterior. For example, I’m writing up some reproducible notes on probability theory and statistics through sampling (in pseudocode with R implementations) and have just come to the point where I’ve introduced and implemented Metropolis ... Read More

Feed: R-bloggers. Author: John Mount. As of cdata version 1.0.8 cdata implements an operator notation for data transform. The idea is simple, yet powerful. First let’s start with some data. d wrapr::build_frame( "id", "measure", "value" | 1 , "AUC" , 0.7 | 1 , "R2" , 0.4 | 2 , "AUC" , 0.8 | 2 , "R2" , 0.5 ) knitr::kable(d) 1 AUC 0.7 1 R2 0.4 2 AUC 0.8 2 R2 0.5 In the above data we have two measurements each for two individuals (individuals identified by the "id" column). Using cdata‘s new_record_spec() method we can capture a description ... Read More

Feed: Planet MySQL; Author: Scotch.io; On almost every website, you're going to watch to share your Social Media accounts for visitors to follow. In this article, we are going to create a Social Follow component in React! Table of Contents For a deeper dive, check out Using Font Awesome 5 with React! TLDR Create a react app, include Font Awesome libraries, and use the social icons. Check out the finished product. To get started, we are going to use Create React App which is a great tool for scaffolding React applications. For reference, I am going to be doing this ... Read More

Feed: R-bloggers. Author: Ryan Sheehy. Hugo Bowne-Anderson, the host of DataFramed, the DataCamp podcast, recently interviewed Debbie Berebichez, a physicist, TV host and data scientist and is currently the Chief Data Scientist at Metis in NY. Hugo: Hi there, Debbie, and welcome to DataFramed. Debbie: Hi, Hugo. It’s a pleasure of mine to be here. Hugo: It is such a pleasure to have you on this show, and I’m really excited to be here today to talk in particular about critical thinking in data science, and what that actually means, and as we know, to get critical about critical thinking ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Andrea Manero-Bastin. This article, written by the Facebook research team, was written by Ben Letham, Brian Karrer, Guilherme Ottoni and Eytan Bakshy. It features some of the techniques used by Facebook for A/B testing. Facebook relies on a large suite of backend systems to serve billions of people each day. Many of these systems have a large number of internal parameters. For example, the web servers that power Facebook use the HipHop Virtual Machine (HHVM) to serve requests, and HHVM has dozens of parameters that control the just-in-time compiler. As another ... Read More

Feed: R-bloggers. Author: Joshua Ulrich. I just pushed a new release of quantmod to CRAN! I’m most excited about the update to getSymbols() so it doesn’t throw an error and stop processing if there’s a problem with one ticker symbol. Now getSymbols() will import all the data it can, and provide an informative error message for any ticker symbols it could not import. Another cool feature is that getQuote() can now import quotes from Tiingo. But don’t thank me; thank Ethan Smith for the feature request [#247] and pull request [#250]. There are also several bug fixes in this release.  The most noticeable are fixes to getDividends()  and getSplits(). Yahoo! Finance continues to ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Vincent Granville. 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. To subscribe, follow this link.   Featured Resources and Technical Contributions  Fascinating New Results in the Theory of Randomness (Updated, long article) + Efficient Tuning of Online Systems Using Bayesian Optimization  K-nn Clustering Explained in One Picture  Logistic Regression in One Picture  March Madness, KenPom and Python/Pandas.  Determining Sample Size in One Picture  Intro to Grafana: Installation, Configuration, and Building the First Dashboard  Combining R ... Read More

Feed: R-bloggers. Author: matloff. In all of my undergraduate classes, I require a term project, done in groups of 3-4 students. Though the topic is specified, it is largely open-ended, a level of “freedom” that many students are unaccustomed to. However, some adapt quite well. The topic this quarter was to choose a CRAN package that does not use any C/C++, and try to increase speed by converting some of the code to C/C++. Some of the project submissions were really excellent. I decided to place one on the course Web page, and chose this one. Nice usage of Rcpp ... Read More