Educate-R

simglm v0.9.23: Propensity Score Modeling

R

simglm

modeling

propensity scores

Building on last week’s post about propensity score simulation, the simglm package has been extended to now allow for the estimation of power in addition to the propensity…

simglm v0.9.22: Propensity Score Simulation

R

simglm

simulation

propensity scores

I haven’t written about my simglm package in a while. Behind the scenes, numerous changes have been made to enhance the package. The current CRAN version is significantly…

simglm v0.7.4: Tidy Simulation

R

Simglm

Simulation

Tidy

I’m happy to formally announce a major update to the simglm R package. In brief, the updated package contains a new more robust syntax for simulating data, adds parallel…

pdfsearch v0.3.0

R

Pdfsearch

Pdf

I’m happy to formally announce a major update to the developmental version of the pdfsearch R package. In brief, this version includes support for splitting the PDF by…

Hierarchical Cluster Analysis of Coach ELO Ratings

R

College Football

Cluster Analysis

For the past few years (quickly approaching a decade), a colleague and I started scraping information about college football coaches to explore the question, which coach…

Announcing `simglm` version 0.6.0: Power and Simulation of Generalized Linear Mixed Models

R

Simglm

Package

The simglm package has an update on CRAN bumping the version up to 0.6.0. This update has added the ability to simulate count data (poisson) and also has fixed (I think) the…

simglm submission to CRAN this week

R

Simglm

Package

This is a quick note looking for any further feedback on the simglm package prior to CRAN submission later this week. The goal is to submit Thursday or Friday this week. The…

Use CSS to format markdown or HTML files

R

Package

Highlighthtml

Markdown

Html

Markdown (and Rmarkdown) are great ways to quickly develop material without worrying about the formatting. The documents can then be compiled using the knitr or rmarkdown pac…

Introduction of the pdfsearch package

R

Pdfsearch

Package

I’m happy to introduce an add-on package, pdfsearch, that adds the ability to do keyword searches on pdf files. This add-on package uses the excellent pdftools package from…

Speed test of sequence generation for unbalanced simulation

R

Sequence

Speedtest

I have a simulation package that allows for the simulation of regression models including nested data structures. You can see the package on github here: simReg. Over the…

Remove leading 0 with ggplot2

R

Graphics

Ggplot2

I recently had an occasion while working on a three variable interaction plot for a paper where I wanted to remove the leading 0’s in the x-axis text labels using ggplot2.…

Dodged bar charts, why not a line graph?

R

Graphics

Ggplot2

Trend

I often see graphs that are poorly implemented in that they do not achieve their goal. One such type of graph that I see are dodged bar charts. Here is an example of a…

Format Markdown Documents in R

R

Highlighthtml

Package

Css

Markdown

Html

Have you ever used a markdown file to create an html file? Have you ever wanted to quickly format the subsequent html file to add some color or other aspects? If your answer…

AERA Preview

R

Rcharts

Javascript

Aera

The American Educational Research Association (AERA) annual conference is this weekend in Philadelphia. I was lucky to have a paper accepted into the conference. I am…

Evolution of Code

R

Code

Xml

Recently while scraping some data from the college football data warehouse site, I started to realize the evolution of my code. To preface this, I am definitely not a…

Update to highlightHTML package

R

Highlighthtml

Markdown

Html

I’ve added a new functionality to my highlightHTML package. This package post-processes HTML files and injects CSS and adds tags to create some further customization (for…

rCharts in slidy

R

Rcharts

Javascript

Html

Slidy

My last post I talked about using rCharts to create interactive graphics for my presentation. They seemed to go over pretty well in my interviews and helped me greatly as I…

Picking a gui interface for R

R

Gui

Recently I decided to switch statistical programs used for the master’s level introductory statistics course I teach here at the University of Arkansas. Historically this…

When I use `plyr`/`dplyr`

R

Plyr

Dplyr

My last post I talked about how I use the data.table package for aggregating and removing duplicate observations. Although I use the data.table package quite often, there…

Two of my favorite data.table features

R

Data.table

When I started to use the data.table package I was primarily using it to aggregate. I had read about data.table and its blazing speed compared to the other options from base…

Guessing Correlations: A shiny app

R

Shiny

Teaching

A recent hobby of mine (as with many other R users) is to play around with the relatively new R package: shiny. I started creating demo applications about a year ago just to…

SPSStoR An R package to convert SPSS syntax

R

Spss

Package

My first statistical software package I used as an undergrad was SPSS. I was fortunate during my senior year at Luther College to be initially introduced to R. I did not…

Formatting Markdown Table with R

R

Markdown

Latex

Slidy

This past August I took an opportunity to step back into the University academic world as a Visiting Assistant Professor at the University of Arkansas. I have enjoyed the…

Formatting Markdown Table with R

R

Markdown

Css

This past summer when the twin cities R user group was starting to get back up and running, I offered to present on some R related things that I was working on. One thing I…

Blog Logo

R

ggplot2

Here is the code used to create the blog logo. Took a bit of trial and error, especially with the official R logo.