Monthly Archives: June 2013

Latent Class Modeling Election Data

June 14, 2013
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Latent Class Modeling Election Data

Latent class analysis is a useful tool that is used to identify groups within multivariate categorical data.  An example of this is the likert scale. In categorical language these groups are known as latent classes. As a simple comparison this can be compared to the k-means multivariate cluster analysis. There are several key differences between the

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R: Interval Estimation of the Population Mean

June 14, 2013
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Interval estimation of the population mean can be computed from functions of the following R packages:stats - contains the t.test;TeachingDemos - contains the z.test; and,BSDA - contains the zsum.test and tsum.test.The t.test of the stats package is a ...

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Interval Estimation of the Population Mean

June 14, 2013
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Interval estimation of the population mean can be computed from the functions of the following R packages:stats - contains the t.testTeachingDemos - contains the z.testBSDA - contains the zsum.test and tsum.testThe t.test of the stats package is a stud...

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Practicing static typing in R: Prime directive on trusting our functions with object oriented programming

June 13, 2013
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The creator of S language which R is derived from John Chambers said in one of his books  Software for data analysis programming with R: ...This places an obligation on all creators of software to program in such away that the computations ca...

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Win Your Fantasy Football Auction Draft: Calculate the Optimal Players to Draft with this Shiny App in R

June 13, 2013
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In this post, I use a Shiny app in R to determine the best possible players to pick in a fantasy football auction draft.  The app takes projections from FantasyPros, The post Win Your Fantasy Football Auction Draft: Calculate the Optimal Players to Draft with this Shiny App in R appeared first on Fantasy Football Analytics.

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How big data and statistical modeling are changing video games

June 13, 2013
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Bill Grosso presented a fascinating webinar about the video gaming industry today, Knowing How People are Playing Your Game Gives You the Winning Hand. He described how over the past three years, game studios have switched from viewing analytics as a primarily descriptive tool to deploying modern data collection practices, machine learning toolkits, and statistical methods to gain a...

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ANOVA and Tukey’s test on R

June 13, 2013
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ANOVA and Tukey’s test on R

OBS: This is a full translation of a portuguese version. In many different types of experiments, with one or more treatments, one of the most widely used statistical methods is analysis of variance or simply ANOVA . The simplest ANOVA can be called “one way” or “single-classification” and involves the analysis of data sampled from The post ANOVA...

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Big in Japan

June 13, 2013
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Big in Japan

Inspired by this post on R-bloggers, I decided to check how BCEA was doing. Unfortunately, it does not feature in the top 100 most downloaded R packages. However, I think it's doing well $-$ considering the book (which is the main medium of advertising of the package) has...

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Getting started with twitteR in R

June 13, 2013
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Getting started with twitteR in R

I have asked by a few people lately to help walk them through using twitter API in R, and I’ve always just directed them to the blog post I wrote last year during the US presidential debates not knowing that Twitter had changed a few things. Having my interest peaked through a potential project at

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Top 100 R packages for 2013 (Jan-May)!

June 13, 2013
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Top 100 R packages for 2013 (Jan-May)!

(This article was first published on R-statistics blog » RR-statistics blog, and kindly contributed to R-bloggers) What are the top 100 (most downloaded) R packages in 2013? Thanks to the recent release of RStudio of their “0-cloud” CRAN log files (but without including downloads from the primary CRAN mirror or any of the 88 other CRAN mirrors), we can now answer this question...

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