July 2013

Quick R tip: ggplot in functions needs some extra care

July 31, 2013 | 0 Comments

When building visualizations with ggplot2 in R I decided to create specialized functions that encapsulate plotting logic for some of my creations. In this case instead of commonly used aes function I had to use its alternative -  aes_string - for aesthetic mapping from a string.And now goes ... [Read more...]

Slidify Did That… and That… and…

July 31, 2013 | 0 Comments

In my exuberance for rCharts, I have not expressed my equal love for its older sibling slidify.  I adopted slidify a little more slowly than other R bloggers Create elegant, interactive presentations from R with Slidify Interactive slides with go... [Read more...]

A dirty hack for importing packages that use Depends

July 31, 2013 | 0 Comments

A dirty hack for importing packages that use Depends 2013-05-27 Source Scope This article is about R package development. Motivation As stated in the the Writing R Extensions manual and the Software for Data Analysis book (aka the R bible), packages should whenever possible use Imports instead of Depends, ... [Read more...]

I made a mistake, please don’t shoot me

July 31, 2013 | 0 Comments

The major difference between commercial/academic written software is the handling of user mistakes, or to be more exact what is considered to be a user mistake. In the commercial world the emphasis is on keeping the customer happy, which translates into trying hard to gracefully handle any ‘mistake’ the ... [Read more...]

Reflections

July 31, 2013 | 0 Comments

We know much as a species yet we have so much more to learn. Each of us alive today could just as easily have been born into consciousness centuries or millenia ago, and have had little idea that the Earth revolved around the Sun nor that our solar system was ...
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Butler Analytics: Real Analysts use R

July 31, 2013 | 0 Comments

In an overview of several predictive analytics platforms (including SPSS, Oracle and SAS), Butler Analytics offers this 4.5/5 star review of Revolution R Enterprise: Real analysts use R – well it sounds a bit macho, but actually there is some truth in it. R is the most widely used, and arguably the ... [Read more...]

Measuring Bias in Published Work

July 31, 2013 | 0 Comments

In a series of previous posts, I’ve spent some time looking at the idea that the review and publication process in political science—and specifically, the requirement that a result must be statistically significant in order to be scientifically notable or publishable—produces a very misleading scientific literature. In ... [Read more...]

Trivial, but useful: sequences with defined mean/s.d.

July 31, 2013 | 0 Comments

O.k., the following post may be (mathematically) trivial, but could be somewhat useful for people that do simulations/testing of statistical methods. Let’s say we want to test the dependence of p-values derived from a t-test to a) the ratio of means between two groups, b) the standard ... [Read more...]

R in Insurance: Presentations are online

July 31, 2013 | 0 Comments

The programme and the presentation files of the first R in Insurance conference have been published on GitHub. Front slides of the conference presentations Additionally to the slides many presenters have made their R code available as well: Alexander McNeil shared the examples of the CreditRisk+ model he presented. Lola ... [Read more...]

R ecology workshop

July 31, 2013 | 0 Comments

After my presentation yesterday to a group of grad students on R resources, I did a presentation today on intro to R data manipulation, visualizations, and analyses/visualizations of biparite networks and community level analyses (diversity, rarefactio... [Read more...]

bdvis development version available for early feedback

July 30, 2013 | 0 Comments

Google Summer of Code 2013 is half way through. Mid term evaluations are underway. I thought this is a good logical point for us to share what we have been doing for Biodiversity Data Visualizations in R project and open up the package for testing and some early feedback. We have ... [Read more...]

Occupancy model fit & AUC

July 30, 2013 | 0 Comments

Occupancy models are used to understand species distributions while accounting for imperfect detection. In this post, I’ll demonstrate a method to evaluate the performance of occupancy models based on the area under a receiver operating characteristic curve (AUC), as published last year by Elise Zipkin and colleagues in Ecological ... [Read more...]

A Chart of Recent Comrades Marathon Winners

July 30, 2013 | 0 Comments

Continuing on my quest to document the Comrades Marathon results, today I have put together a chart showing the winners of both the men and ladies races since 1980. Click on the image below to see a larger version. The analysis started off with the same data set that I was ... [Read more...]

Crowdfunding the Ubuntu Edge will fail

July 30, 2013 | 0 Comments

Tuesday 30 July 2013 - 14:14 Although the Ubuntu Edge has been record-breaking in its crowdfunding efforts, the fundraising campaign will fall well short of its 32 million dollar target. Just to be clear, I hope to be proven wrong! I backed the Ubuntu Edge Indiegogo fundraiser at the $625 level and would really, really ... [Read more...]

Interfacing R and Google maps

July 30, 2013 | 0 Comments

Introduction I couple of weeks ago I had an idea for a website where people can collaborate to create the first real Audio Atlas, using the power of the Google Maps API. The problem was that I do some programming in R but I did know very few things about ... [Read more...]

Visualizing Book Sentiments

July 30, 2013 | 0 Comments

Sentiment analysis of social media content has become pretty popular of late, and a few days ago, as I lay in bed, I wondered if we could do the same thing to books - and see how sentiments vary through the story.The answer, of course, was that yes, we ... [Read more...]
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