R-statistics blog

R-bloggers

• Visualising diurnal wind climatologies
  In this post I want to highlight the second core function of the metvurst repository: The windContours function It is intended to provide a compact overview of the wind field climatology at a location and plots wind direction and speed as a functio... […]
• ARMA+GARCH Experiences
  A reader’s comment on my ARMA Models for Trading post asked about different aspects of my experience with ARMA+GARCH for trading forecasting. The more I thought about it, the more it looked like a full post. So here we go. Starting with the high level – what packages did I try? I have tried a […]
• My Intro to Multiple Classification with Random Forests, Conditional Inference Trees, and Linear Discriminant Analysis
  After the work I did for my last post, I wanted to practice doing multiple classification.  I first thought of using the famous iris dataset, but felt that was a little boring.  Ideally, I wanted to look for a practice … Continue reading → […]
• Why Do the New Orleans Saints Lose? Data Visualization II
  I’m going to continue with my ‘making data visually appealing to the masses’ kick. I happen to like graphics and graphing data. I also happen to like American football (For the record, however, I’m a soccer player first, a rugby … Continue reading → […]
• Opening Large CSV Files in R
  Before heading home for the holidays, I had a large data set (1.6 GB with over 1.25 million rows) with columns of text and integers ripped out of the company (Kwelia) Database and put into a .csv file since I was going to be offline a lot over the break. I tried opening the csv file […]
• Wrapper functions in GNU R
  Recently I have been working with GNU R optimization routines a lot. Function optim has a nice trace option that allows to monitor optimization progress. Another standard function optimize has no such feature but it is pos... […]
• MeRRy ChRistmas!
  Merry Christmas is.R() readers! Thanks for accompanying us through an excellent first semester of R blogging, and for your feedback and enthusiasm. To celebrate, we’ve built an image mosaic from the shiny, happy avatars of our over 600 (!) Twitte... […]
• Common words in the Gathering Storm
  The Wheel of Time is a series of books started by Robert Jordan. Unfortunately he died too early. Like all fans of the series I feel very lucky that Brandon Sanderson was able to continue these books. The first book Sanderson wrote was the Gathering St... […]
• 24 Christmas Gifts from is.R
  The is.R blog has been on a roll in December with their Advent CalendaR feature: daily tips about R to unwrap each day leading up to Christmas. If you haven't been following it, start with today's post and scroll down. Sadly there isn't a tag to collect all these great posts together, but here are a few highlights: December 4: Reading and writ […]
• Miles of iles
  An explanation of quartiles, quintiles deciles, and boxplots. Previously “Again with variability of long-short decile tests” and its predecessor discusses using deciles but doesn’t say what they are. The *iles These are concepts that have to do with approximately equally sized groups created from sorted data. There are 4 groups with quartiles, 5 with quintil […]