# Monthly Archives: July 2013

## There is definitely R in July

July 1, 2013
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The useR!2013 conference in Albacete, Spain, will commence next Wednesday, 10 July, and on the day before Diego and I will give a googleVis tutorial. The following Monday, 15 July, the first R in Insurance event will take place at Cass Business School ...

## Some Common Approaches for Analyzing Likert Scales and Other Categorical Data

July 1, 2013
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$Some Common Approaches for Analyzing Likert Scales and Other Categorical Data$

Analyzing Likert scale responses really comes down to what you want to accomplish (e.g. Are you trying to provide a formal report with probabilities or are you trying to simply understand the data better). Sometimes a couple of graphs are sufficient and a formalize statistical test isn’t even necessary. However, with how easy it is

## integral priors for binomial regression

July 1, 2013
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Diego Salmerón and Juan Antonio Cano from Murcia, Spain (check the movie linked to the above photograph!), kindly included me in their recent integral prior paper, even though I mainly provided (constructive) criticism. The paper has just been arXived. A few years ago (2008 to be precise), we wrote together an integral prior paper, published

## Using ESS-Remote

July 1, 2013
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If you use R and ssh into other machines a lot, e.g. for doing some big data stuff on ec2, ess-remote is a great tool. Just use M-x ssh to ssh into the remote machine, then launch R. Now just M-x ess-remote and you can use the R process just like a local process! Productivity win. Also see

## Maximum Entropy Bootstrap Rescale and Symmetrize

July 1, 2013
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R code for changing scale without changing mean or to make a probability distribution symmetric. These are commonly encountered problems by R programmers. We provide code for both of these tasks in the context of maximum entropy bootstrap (meboot) package in R.

## OpenAnalytics @ UseR 2013: What’s on the Program?

July 1, 2013
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Monday 1 July 2013 - 22:37 OpenAnalytics is once more proud sponsor of the yearly R User Conference and sent a strong delegation to present some of its recent work. On Tuesday July 9 Tobias Verbeke and Stephan Wahlbrink give a pre-conference...

## Power and sample size calculator for mitochondrial DNA association studies (Shiny)

July 1, 2013
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The functions detailed inside the piece of code below (in a Gist) has been useful for me when I had to calculate many possible scenarios of statistical power and sample size. The formulae were taken from the article of Samuels … Sigue leyendo →

## Web Analytics Visualization through ggplot2

July 1, 2013
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During our last webinar, we covered some of the basic ideas behind ggplot2, the R Visualization package by Dr. Hadley Wickham. In this blog post I will walk through the example that I covered during the webinar. In order to carry out the examples yourself, you may download the dummy datasets from this link Creating

## R and PostgreSQL – using RPostgreSQL and sqldf

July 1, 2013
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PostgreSQL and R can often be used together for data analysis - PostgreSQL as database engine and R as statistical tool. In this article you will learn how to access data stored in PostgreSQL database and how to write the data back using RPostgreSQL an...