January 2012

Suicide vs Divorce rates by country using ggplot

January 10, 2012 | Altons

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 ... [Read more...]

Presenting results of logistic regression

January 10, 2012 | Recology

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...
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Words in Politics: Some extensions of the word cloud

January 10, 2012 | Ian

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 ... [Read more...]

Honing Your R Skills for Job Interviews

January 9, 2012 | wrathematics

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 ... [Read more...]

Harmonic means, again again

January 9, 2012 | xi'an

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 ... [Read more...]

R in Axys (Impossible Dream)

January 9, 2012 | klr

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...
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Optimization for Finance with R

January 9, 2012 | David Smith

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 ... [Read more...]

Goals for 2012

January 9, 2012 | John Ramey

I have never been one to set New Year’s resolutions. Personally, they instill a dangerous personal freedom that often yield naive, subconscious mentalities, such as I can do anything I want until December 31, and I will change abruptly the next day. ... [Read more...]

Sensitivity of risk parity to variance differences

January 9, 2012 | Pat

Equal risk contribution of assets determines the asset weights given the variance matrix.  How sensitive are those weights to the variance estimate? Previously The post “Risk parity” gave an overview of the idea. In particular it distinguished the cases: the assets have equal risk contribution groups of assets have equal ... [Read more...]

Feedback from vignette survey

January 8, 2012 | Markus Gesmann

Many thanks to all who participated in the survey about writing R package vignettes.Following my post last Thursday the responses came in quickly in the evening and all day on Friday. Since Saturday the response rate has been decreasing constantly and ...
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Tracking my expenses

January 8, 2012 | Karsten W.

One new-year resolution I made last year was to understand where my money goes. From previous experiments I know that expense tracking has to be as simple as possible. My approach is toUse my cash card as often as possible. This automatically tracks the date and some information on the ...
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When I was 29…

January 8, 2012 | John Ramey

Today was my 29th birthday, and I kept things simple: I ate with my wife and my newborn son at a local eatery. Later, my wife cooked steaks for dinner. For the most part, I took the day off in that I did not work on my dissertation. But I ... [Read more...]

Project Euler in R: Problem 22

January 7, 2012 | Neha

I solve Project Euler problems for recreation. I am using the Statistical Language R to solve these. R is free for use and download, so I would recommend downloading it if you are interested in Statistical computation. This is problem 22 from Project E... [Read more...]

1500th, 3000th, &tc

January 7, 2012 | xi'an

As the ‘Og reached its 1500th post and 3000th comment at exactly the same time, a wee and only mildly interesting Sunday morning foray in what was posted so far and attracted the most attention (using the statistics provided by wordpress). The most visited posts: Title Views Home page 203,727 In{... [Read more...]
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