Sunday, April 20, 2014

How Fast the Fastest Human Would Run 100m?

People have used extreme value theory to predict the records in various sports. Here is an articles which provides codes to visualize the same. One can update the dataset to take into account latest records. It's interesting to see how this updation affects the estimates:

Where nobody lives

Despite having a population of more than 310 million people, 47 percent of the USA remains unoccupied. Here is a map showing places where nobody lives:

Vectorization in R: Why?

Beginning R users are often told to “vectorize” their code. Here, is an attempt to explain why vectorization can be advantageous in R by showing how R works under the hood:

Checking (G)LM assumptions in R

(Generalized) Linear models make some strong assumptions concerning the data structure. Here is how to verify those assumptions in R:

Wednesday, April 16, 2014

Mapping a century of earthquakes

Did you know that United States Geological Survey maintains an ever growing archive of earthquakes detected around the world, and they make it easy to query and download?
Here is how you can map that data using R:

Benefits of using Open Source Software

Why public universities should use open source software? Read the reasons at:

Monday, April 14, 2014

The Median Isn't the Message

The Median Isn't the Message is the wisest, most humane thing ever written about cancer and statistics. It is the antidote both to those who say that, "the statistics don't matter," and to those who have the unfortunate habit of pronouncing death sentences on patients who face a difficult prognosis. Anyone who researches the medical literature will confront the statistics for their disease. Anyone who reads this will be armed with reason and with hope:

Thursday, April 10, 2014

Beeps and progress alerts to your phone

Would you like your R program to alert you with a beep or ping, as soon as the execution is over? then here is the way out:

R Help about Symbols

How to open R help about a symbol or punctuation mark like ( parenthesis or [ bracket:

Saturday, April 5, 2014

God is a Gambler

"All the evidence shows that God was actually quite a gambler, and the universe is a great casino, where dice are thrown, and roulette wheels spin on every occasion."

- Stephen Hawking

Friday, April 4, 2014

Some R Resources for GLMs

It is relatively easy to figure how to code a GLM in R. Even a total newcomer to R is likely to figure out that the glm() function is part of the core R language within a minute or so of searching. Thereafter though, it gets more difficult to find other GLM related stuff that R has to offer. Here is a far from complete, but hopefully helpful, list of resources.

Thursday, April 3, 2014

Does R have too many packages?

Most of us agree with the fact that availability of thousands of packages on CRAN is often life saving. But, there are few, who feel that there are rather too many packages on R. Read this post to know what makes them think the other way?

Seven quick facts about R

Here are some key facts about growth of R:

Tuesday, April 1, 2014

Probability of Extreme Events like 9/11

An interesting article on estimating probability of large terrorist events like 9/11

Global Flow of People

A very cool representation of global migration flows between all countries using R:

Don't miss this link and check out the migration pattern of your country: