By Gabriel Vasconcelos Motivation In a late post I talked about inference after model selection showing that a simple double selection procedure is enough to solve the problem. In this post I’m going to talk about a generalization of the … Continue reading →
Hello R users! We have a big announcement this week as well, DataCamp just released our first Spark in R course: Introduction to Spark in R using sparklyr! This course...
In advance of the recent UK general election, ODI Leeds published an interactive hexmap of constituencies to provide a navigation surface over various datasets relating to Westminster constituencies: As...
This exercise set provides (further) practice in writing Excel documents using the xlsx package as well as importing and general data manipulation. Specifically we have loops in order for...
This article describes how to create easily basic and ordered bar plots using ggplot2 based helper functions available in the ggpubr R package....
As part of my new role as Lecturer in Agri-data analysis at Harper Adams University, I found myself applying a lot of techniques based on linear modelling. Another thing...
Below is an example showing how to fit a Generalized Linear Model with H2O in R. The output is much more comprehensive than the one generated by the generic...
Lately, I have been more and more taken with tidy principles of data analysis. They are elegant and make analyses clearer and easier to comprehend. Following the tidyverse and...
Shiny applications of all stripes (including flexdashboard with runtime Shiny) are revolutionary in that they put the power of R directly in the end user’s hands without needing to...
I’m pleased to announce the release of the dbplyr package, which now contains all dplyr code related to connecting to databases. This shouldn’t affect you-as-a-user much, but it makes...
The Mandelbrot set is iconic and countless beautiful visualisations have been born from its deceptively simple recursive equation. R’s plotting ecosystem should be the perfect setting for generating these...
TLDR: Most Julia programmers also use Python. However, most R programmers also use Julia.Recently Stack Overflow has made public the results of Developer Survey 2017. It is definitely an...
Written by Chen Trilnik and Jack Yip. To view the original source code, visit our Github repo here. I. Introduction Business Objective In the last decade, The post Forecasting...
Don’t worry about a thing ’cause every little thing gonna be alright (Three Little Birds, Bob Marley) One of my favourite books is The Computational Beauty of Nature by...
Rmarkdown is an enormously useful system for combining text, output and graphics generated by R into a single document. Images, in particular, are a powerful means of communication in...
I’m pleased to announce that bigrquery 0.4.0 is now on CRAN. bigrquery makes it possible to talk to Google’s BigQuery cloud database. It provides both DBI and dplyr backends...
DENSITY THE AVERAGE PERSON EXPERIENCES CLICK TO ENLARGE In Alaska, there’s about one person for each square mile of land. You might picture a typical Alaskan not being able...
(This article was first published on R – Win-Vector Blog, and kindly contributed to R-bloggers) From dplyr issue 2916. The following appears to work. suppressPackageStartupMessages(library("dplyr")) COL % group_by(.data]) %>%...
I’m very pleased to announce my DataCamp course on Visualizing Time Series Data in R. This course is also part of the Time Series with R skills track. Feel free...
The padr package was designed to prepare datetime data for analysis. That is, to take raw, timestamped data, and quickly convert it into a tidy format that can be...
Volatility modelling is typically used for high frequency financial data. Asset returns are typically uncorrelated while the variation of asset prices (volatility) tends to be correlated across time. In...
Since about October last year, I’ve been writing an introduction to R book. It’s been quite the experience. I’ve finally started making time to document some of the interesting...
I just discovered an interesting ggplot2 extension, geofacet, that supports arranging facet panels that mimics geographic topoloty. After playing with it, I realized that it is not only for visualizing...
The importFile() function in H2O is extremely efficient due to the parallel reading. The benchmark comparison below shows that it is comparable to the read.df() in SparkR and significantly...
Ideally, a study that uses randomization provides a balance of characteristics that might be associated with the outcome being studied. This way, we can be more confident that any...
I’ve caved in to the hex sticker craze, and produced some hex stickers for the forecast package for R. If you attend a workshop I teach, I’ll give you...
Data visuals: notes for my talks in 2017 Supplementary notes for CJ Brown’s talks on dataviz in 2017 for Griffith University’s honours students and the UQ Winterschool in Bioinformatics. Skip to the quiz Visualsing...
Adding Features to your Charts We saw in the previous charts some basic and well-known types of charts that googleVis offers to users. Before continuing with other, more sophisticated...
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