Tag: R

Feed: R-bloggers. Author: Javier Fernández-López. [This article was first published on long time ago..., 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.  Hi there, This is the best meme I’ve found during these days… Well, here it is my “BUT” contribution. Some weeks ago The Washington Post published this simulations about how “social distancing” could help to “flat the curve” of COVID-19 infections. I fell in love with these simulations because their simplicity ... 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. In our last post, we discussed using the historical average return as one method for setting capital market expectations prior to constructing a satisfactory portfolio. We glossed over setting expectations for future volatility, mainly because it is such a thorny issue. However, we read an excellent tutorial on GARCH models ... Read More

Feed: R-bloggers. Author: An Accounting and Data Science Nerd's Corner. Downloading and data cleaning Downloading the data form the Oxford homepage is straightforward. Automatic column detection by read_xlsx() fails so I provide columns manually. suppressPackageStartupMessages({ library(kableExtra) library(dplyr) library(tidyr) library(lubridate) library(tidycovid19) library(ggplot2) library(stringr) library(readxl) library(gghighlight) library(RCurl) }) dta_url The file is organized by country-date and sorted by date. As in essence interventions data is event driven for each country (meaning that interventions happen infrequently at certain dates), I sort the data by country-date to get a better view on its structure. Also, I adjust some names and concentrate on the policy ... Read More

Feed: Planet PostgreSQL. I really love what Debian did to make Postgres administration tasks easier. However, when I was writting the article “What’s wrong with Postgres?", I found something unexpected in my Ubuntu server.I was trying to find Postgres logfile, so I tried postgres=# select pg_current_logfile(); pg_current_logfile -------------------- (1 row) But, I know that, by default, I’ll find my logs under /var/log/postgresql, and sure enough: [root@elinor] ll /var/log/postgresql/ drwxrwxr-t 2 root postgres 4096 Apr 4 13:08 ./ drwxrwxr-x 10 root syslog 4096 Apr 4 12:45 ../ -rw-r----- 1 postgres adm 563 Apr 4 13:08 postgresql-12-elinor.log So, how did my wrapper ... Read More

Feed: R-bloggers. Author: Unknown. [This article was first published on Deeply Trivial, 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. For the letter D, I’m going to talk about the dummy_cols functions, which isn’t actually part of the tidyverse, but hey: my posts, my rules. This function is incredibly useful for creating dummy variables, which are used in a variety of ways, including multiple regression with categorical variables. When conducting linear regression, the ... Read More

Feed: R-bloggers. Author: Posts | Joshua Cook. [This article was first published on Posts | Joshua Cook, 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. Introduction Caching intermediate objects in R can be an efficient way to avoidre-evaluating long-running computations. The general process is alwaysthe same: run the chunk of code once, store the output to disk, and loadit up the next time the same chunk is run. There are, of course,multiple packages ... Read More

Feed: R-bloggers. Author: Thinking inside the box. [This article was first published on Thinking inside the box , 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 new release 0.4.12 of RQuantLib arrived on CRAN today, and was uploaded to Debian as well. QuantLib is a very comprehensice free/open-source library for quantitative finance; RQuantLib connects it to the R environment and language. This version does relatively little. When QuantLib 1.18 came out, I ... Read More

Feed: R-bloggers. Author: R/exams. [This article was first published on R/exams, 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. Webinar hosted by Why R? Foundation: Slides, video, and e-learning resources. Why R? Webinar 001 R/exams was presented in the first Why R? webinar by Achim Zeileis. Marcin Kosiński was the host and did a great job setting up the Zoom session that was streamed live on YouTube where more than 100 participants joined ... Read More

Feed: Planet MySQL; Author: Continuent; In this blog post, we talk about the basic function and features of the Tungsten Connector.The Tungsten Connector is an intelligent MySQL proxy that provides key high-availability and read-scaling features. This includes the ability to route MySQL queries by inspecting them in-flight. Connector Basics Understanding the Two Key Features The most important function of the Connector is failover handling. When the cluster detects a failed master because the MySQL server port is no longer reachable, the Connectors are signaled and traffic is re-routed to the newly-elected Master node. Next is the ability to route MySQL ... Read More

Feed: R-bloggers. Author: Sebastian Wolf. Governments and COVID-19: Which one stops it faster, better, has fewer people dying? These questions get answered with my dashboard. A contribution to the shiny-contest: https://community.rstudio.com/t/material-design-corona-covid-19-dashboard-2020-shiny-contest-submission/59690 Intro How did Corona spread? Using the animation feature of R-shiny this can be easily tracked.COVID-19 is the major topic in all news channels. The place I live in is Munich, Germany. Within weeks Germany moved from 3 patients in the hospital next to my home, to have 20,000 patients. As a data-scientist, I did not only see the numbers but the exponential growth. I wanted to know: How ... Read More