Blog Archives

Simulation and power analysis of generalized linear mixed models

June 28, 2016
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Simulation and power analysis of generalized linear mixed models

Simulation and power analysis of generalized linear mixed models Brandon LeBeau University of Iowa Overview (G)LMMs Power simglm package Demo Shiny App! Linear Mixed Model (LMM) Power Power is the ability to statistica...

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Interactively building test forms from an IRT perspective An application of R and Shiny

February 18, 2016
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Interactively building test forms from an IRT perspective An application of R and Shiny

Interactively building test forms from an IRT perspective: An application of R and Shiny Brandon LeBeau University of Iowa Overview R R is an open source statistical programming language. Pros: Common statistical procedures...

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Interactively building test forms from an IRT perspective An application of R and Shiny

February 18, 2016
By
Interactively building test forms from an IRT perspective An application of R and Shiny

Interactively building test forms from an IRT perspective: An application of R and Shiny Brandon LeBeau University of Iowa Overview R R is an open source statistical programming language. Pros: Common statistical procedures...

Read more »

Web Scraping to Item Response Theory – A College Football Adventure

December 4, 2015
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Web Scraping to Item Response Theory – A College Football Adventure

Web Scraping to Item Response Theory: A College Football Adventure Brandon LeBeau, Andrew Zieffler, and Kyle Nickodem University of Iowa & University of Minnesota Background Began after Tim Brewster was fired Wanted to try to predict next great coach Data Available Data is available at three levels Coach Game by Game Team Coach Data Overall record Team history Not Available Coordinator history Example Coach Data ## Year...

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Web Scraping to Item Response Theory – A College Football Adventure

December 4, 2015
By
Web Scraping to Item Response Theory – A College Football Adventure

Web Scraping to Item Response Theory: A College Football Adventure Brandon LeBeau, Andrew Zieffler, and Kyle Nickodem University of Iowa & University of Minnesota Background Began after Tim Brewster was fired Wanted to try to predict next great coach Data Available Data is available at three levels Coach Game by Game Team Coach Data Overall record Team history Not Available Coordinator history Example Coach Data ## Year...

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Speed test of sequence generation for unbalanced simulation

March 30, 2015
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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 weekend I updated the package to allow for the simulation of unbalanced designs. ...

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Speed test of sequence generation for unbalanced simulation

March 30, 2015
By

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 weekend I updated the package to allow for the simulation of unbalanced designs. ...

Read more »

Remove leading 0 with ggplot2.

March 22, 2015
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Remove leading 0 with 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. This was primarily due to some space concerns I had for the x-axis labels. Unfor...

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Remove leading 0 with ggplot2.

March 22, 2015
By
Remove leading 0 with 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. This was primarily due to some space concerns I had for the x-axis labels. Unfor...

Read more »

Structured simulation of regression models – simReg package.

September 30, 2014
By

I'd like to introduce a package that simulates regression models. This includes both single level and multilevel (i.e. hierarchical or linear mixed) models up to two levels of nesting. The package produces a unified framework to simulate all types of c...

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