Continuing on the below post, I am going to use a gradient boosted machine model to predict combined miles per gallon for all 2019 motor vehicles. Part 1: Using Decision Trees and Random Forest to Predict MPG for 2019 Vehicles The raw data is located on the EPA government siteThe variables/features I am using for the models are: Engine...
In this note, we discuss the use of Cohen’s D for planning difference-of-mean experiments. Estimating sample size Let’s imagine you are testing a new weight loss program and comparing...
I’ve become a big fan of the {logspline} package over the past ~6 months and decided to wrap up a manual ggplot2 plotting process (well, it was at least...
It has been only two months since I summarized my reviews of point-and-click front ends for R, and it’s already out of date! I have converted that post into...
In this article, we discuss the basics of ordinal logistic regression and its implementation in R. Ordinal logistic regression is a widely used classification method, with applications in variety...
A new minor release of the anytime package is arriving on CRAN. This is the fifteenth release, and first since the 0.3.3 release in November. anytime is a very...
Many of you might have heard of the concept “Wisdom of the Crowd”: when many people independently guess some quantity, e.g. the number of marbles in a jar glass,...
Whenever I’m developing R code or writing data wrangling or analysis scripts for research projects that I work on I use Emacs and its add-on package Emacs Speaks Statistics...
Introduction Survival distributions Shapes of hazard functions Exponential distribution Weibull distribution (AFT) Weibull distribution...
by Mariluz Congosto Network analysis offers a perspective of the data that broadens and enriches any investigation. Many times we deal with...
![Le Monde puzzle [#1104]](https://xianblog.files.wordpress.com/2015/10/lemondapari.jpeg?w=450&h=299&%23038;zoom=2)
A palindromic Le Monde mathematical puzzle: In a monetary system where all palindromic amounts between 1 and 10⁸ have a coin, find the numbers less than 10³ that cannot...
Next week, I will be in Manizales, Colombia, for the Third International Congress on Actuarial Science and Quantitative Finance. I will be giving a lecture on Wednesday with Jed...
As I’ve been writing up a progress report for my NIGMS R35 MIRA award, I’ve been reminded at how much of the work that we’ve been doing is focused...
The modelDown package turns classification or regression models into HTML static websites. With one command you can convert one or more models into a website with visual and tabular...
A few weeks ago, I gave a talk at the Edinburgh R users group EdinbR on the RAGE paper. Since this is an R meetup, the talk concentrated on...
I mentioned EtherCalc in a previous post and managed to scrounge some time to put together a fledgling {ethercalc} package (it’s also on GitLab, SourceHut, Bitbucket and GitUgh, just...
ANOVA is routinely used in applied biology for data analyses, although, in some instances, the basic assumptions of normality and homoscedasticity of residuals do not hold. In those instances,...
Earlier this week, Github introduced Noops, a collection of simple black-box machines with API endpoints, with the goal of challenging developers of all skill levels to solve problems with...
We are delighted to announce that Helen Hunter, Chief Data Officer at Sainsbury’s will deliver the opening keynote address at this year’s London EARL conference. As Chief Data Officer...
Periodogram with R The power spectral density (PSD) is a function that describes the distribution of power over the frequency components composing our data set. If we knew the...
Today tidytext 0.2.1 is available on CRAN! This new release of tidytext has a collection of nice new features. Bug squashing! 🐛 Improvements to error messages and documentation 📃 Switching from broom...
PreambleColleagues and I had some sweet telemetry data, we did some simple models (& some relatively more complex ones too), we drew maps, and we wrote a paper. However,...
As a data analyst you want to provide clear cut insights for your end users, enabling them to extract all the business value provided by your solution. If your...
For some time, I’ve planned to write up a point-by-point comparison of R and Python. I’ve done so now! Comments welcome. Advertisements
We were recently presented with a problem where the decision maker wanted to understand how their data would naturally group together. The classic technique of k-means clustering was a...
This RStudio Connect patch release addresses an urgent security update and an important bug fix. Security Update: Password Authentication A vulnerability has been identified for customers using RStudio Connect’s built-in password...
rOpenSci’s community is increasingly international and multilingual. While we have operated primarily in...
