Monthly Archives: January 2012

Suicide vs Divorce rates by country using ggplot

January 10, 2012
By
Suicide vs Divorce rates by country using ggplot

I was looking for data I could use with the geom_text() object in ggplot2 and came across this data from the World Health Organization about the suicide rates by country which I found very handy for my example. I used the scale_colour_gradient2() with 3 colors, red, gray and black but it only picked up gray and

Read more »

Coming of Age: R and Spatial Data Visualisation

January 10, 2012
By
Coming of Age: R and Spatial Data Visualisation

I have been using R (a free statistics and graphics sof

Read more »

Presenting results of logistic regression

January 10, 2012
By
Presenting results of logistic regression

So my advisor pointed out this 'new' (well, 2004), way of plotting results of logistic regression results. The idea was presented in a 2004 Bulletin of the Ecological Society of America issue (here). I tried to come up with a solution using, what el...

Read more »

Presenting results of logistic regression

January 10, 2012
By
Presenting results of logistic regression

So my advisor pointed out this 'new' (well, 2004), way of plotting results of logistic regression results. The idea was presented in a 2004 Bulletin of the Ecological Society of America issue (here). I tried to come up with a solution using, what el...

Read more »

Words in Politics: Some extensions of the word cloud

January 10, 2012
By
Words in Politics: Some extensions of the word cloud

The word cloud is a commonly used plot to visualize a speech or set of documents in a succinct way. I really like them. They can be extremely visually pleasing, and you can spend a lot of time perusing over the words gaining new insights. That said, they don't convey a great deal of information. From a

Read more »

Aggregation and Restructuring data (from “R in Action”)

January 9, 2012
By
Aggregation and Restructuring data (from “R in Action”)

The followings introductory post is intended for new users of R.  It deals with the restructuring of data: what it is and how to perform it using base R functions and the {reshape} package. This is a guest article by Dr. Robert I. Kabacoff, the founder of (one of) the first online R tutorials websites: Quick-R. Kabacoff Read more...

Read more »

Honing Your R Skills for Job Interviews

January 9, 2012
By
Honing Your R Skills for Job Interviews

My time as a grad student will soon draw to a close. With this comes the terrifying realisation that I'm going to start applying for jobs and, hopefully, interviewing soon, forever leaving my comfortable security blanket of academia. With that horrible thought in mind, I've been doing some poking around to see what various kinds of technical interviews are...

Read more »

Harmonic means, again again

January 9, 2012
By
Harmonic means, again again

Another arXiv posting I had had no time to comment is Nial Friel’s and Jason Wyse’s “Estimating the model evidence: a review“. This is a review in the spirit of two of our papers, “Importance sampling methods for Bayesian discrimination between embedded models” with Jean-Michel Marin (published in Jim Berger Feitschrift, Frontiers of Statistical Decision

Read more »

R in Axys (Impossible Dream)

January 9, 2012
By
R in Axys (Impossible Dream)

It has always been a dream of mine to incorporate R graphs and analysis in an Advent Axys report.  The unbelievable work from the guys at Statconn http://rcom.univie.ac.at/ make this dream possible.  If we use the same perhstsp.rep created fo...

Read more »

Optimization for Finance with R

January 9, 2012
By

Last year, the Statistics and Mathematics Department of the Vienna University School of Economics and Business presented a research seminar series on optimization, taught by R Core Group member Kurt Hornik (with Ronald Hochreiter and Stefan Theussl). Even if you couldn't make it to Austria to attend the course, the course materials are available online, and make an excellent...

Read more »