Monthly Archives: October 2011

Batman Equation Happy Halloween! Plot the Batman logo in…

October 31, 2011
By
Batman Equation

Happy Halloween! Plot the Batman logo in…

Batman Equation Happy Halloween! Plot the Batman logo in CloudStat with the legendary Batman Equation.

Read more »

Power Tools for Aspiring Data Journalists: R

October 31, 2011
By
Power Tools for Aspiring Data Journalists: R

Picking up on Paul Bradshaw’s post A quick exercise for aspiring data journalists which hints at how you can use Google Spreadsheets to grab – and explore – a mortality dataset highlighted by Ben Goldacre in DIY statistical analysis: experience the thrill of touching real data, I thought I’d describe a quick way of analysing

Read more »

Testing for…

October 31, 2011
By
Testing for…

Input Output Testing for regression Input: advertising=c(1,2,3,4,5) sales=c(1,1,2,2,4) sales.Reg=lm(sales~advertising) summary(sales.Reg) Output: > advertising=c(1,2,3,4,5) > sales=c(1,1,2,2,4) > > sales.Reg=lm(sales~advertising) > summary...

Read more »

Risk parity

October 31, 2011
By
Risk parity

Some thoughts and resources regarding a popular fund management buzzword. The idea Given asset categories (like stocks, bonds and commodities) create a portfolio where each category contributes equally to the portfolio variance. Two operations There are two cases in creating a risk parity portfolio: the universe is the asset categories the universe is the assets … Continue reading...

Read more »

Sampling for Monte Carlo simulations with R

October 31, 2011
By
Sampling for Monte Carlo simulations with R

I've knocked together a quick function for generating efficient Monte Carlo samples. It takes a bit of the legwork out of running Monte Carlo simulations.

Read more »

Using IUCN-Data, ArcMap 9.3 and R to Map Species Diversity

October 31, 2011
By
Using IUCN-Data, ArcMap 9.3 and R to Map Species Diversity

..I'm overwhelmed by the ever-growing loads of data that's made available via the web. I.e., IUCN collects and hosts spatial species data which is free for download. I'm itching to play with all this data... And, in the end there may arise ...

Read more »

Reading Excel data is easy with JGR and XLConnect

October 30, 2011
By

Despite the fact that Excel is the most widespread application for data manipulation and (perhaps) analysis, R's support for the xls and xlsx file formats has left a lot to be desired. Fortunately, the XLConnect package has been created to fill this void, and now JGR 1.7-8 includes integration with XLConnect package to load .xls

Read more »

Learning R: Project 1, Part 2

October 30, 2011
By
Learning R: Project 1, Part 2

So it's been a week since I started down this path.  I worked most of this out over last weekend, went to a conference, had hectic week at work, and then realized I lost my work.  Gah.I'll be posting my general thoughts on R later.  Most...

Read more »

Bayesian ideas and data analysis

October 30, 2011
By
Bayesian ideas and data analysis

Here is another Bayesian textbook that appeared recently. I read it in the past few days and, despite my obvious biases and prejudices, I liked it very much! It has a lot in common (at least in spirit) with our Bayesian Core, which may explain why I feel so benevolent towards Bayesian ideas and

Read more »

The present and future of the R blogosphere (~7 minute video from useR2011)

October 30, 2011
By
The present and future of the R blogosphere (~7 minute video from useR2011)

This is (roughly) the lightning talk I gave in useR2011. If you are a reader of R-bloggers.com then this talk is not likely to tell you anything new. However, if you have a friend, college or student who is a new useRs of R, this talk will offer him a decent introduction to what the R Read more...

Read more »