Monthly Archives: December 2010

Root finding

December 4, 2010
By

Numerical root finding methods use iteration, producing a sequence of numbers that hopefully converge towards a limits which is a root. In this post, only focus four basic algorithm on root finding, and covers bisection method, fixed point method, Newton-Raphson method, and secant method. Read More: 1886 Words Totally

Read more »

Root finding

December 4, 2010
By

Numerical root finding methods use iteration, producing a sequence of numbers that hopefully converge towards a limits which is a root. In this post, only focus four basic algorithm on root finding, and covers bisection method, fixed point method, Newton-Raphson method, and secant method. Read More: 1896 Words Totally

Read more »

Le Monde puzzle [48: resolution]

December 4, 2010
By
Le Monde puzzle [48: resolution]

The solution to puzzle 48 given in Le Monde this weekend is rather direct (which makes me wonder why the solution for 6 colours is still unavailable..) Here is a quick version of the solution: Consider one column, 1 say. Since 326=5×65+1, there exists one value c with at least 66 equal to c. Among

Read more »

A Draft of ProjectTemplate v0.2-1

December 3, 2010
By

I’ve just uploaded a new binary of ProjectTemplate to GitHub. This is a draft version of the next release, v0.2-1, which includes some fairly substantial changes and is backwards incompatible in several ways with previous versions of ProjectTemplate. Foremost of the changes is that most of the logic for load.project() is now built into the

Read more »

Fun with infochimps: Animated Blog Post Hit Map

December 3, 2010
By

In a few weeks I will be visiting Chicago, and JD Long—the organizer of the local R users group—has graciously invited me to give a presentation. Ostensibly, the presentation will be on my recently released infochimps package, so I thought it was a good time to start actually putting together some examples and documentation for

Read more »

Some ideas on communicating risks to the general public

December 3, 2010
By
Some ideas on communicating risks to the general public

SOME EMPIRICAL BASES FOR CHOOSING CERTAIN RISK REPRESENTATIONS OVER OTHERS This week DSN posts some thoughts (largely inspired by the work of former colleagues Stephanie Kurzenhäuser, Ralph Hertwig, Ulrich Hoffrage, and Gerd Gigerenzer) about communicating risks to the general public, providing references and delicious downloads where possible. Representations to use less often Single-event probabilities as

Read more »

Because it’s Friday: The 4th Amendment X-ray T-shirt

December 3, 2010
By
Because it’s Friday: The 4th Amendment X-ray T-shirt

Here's a clever way to express your objection to the obtrusiveness of the new backscatter X-ray scanners at airports: A T-shirt with the text of the 4th Amendment printed in metallic ink: Also available in underwear format. Cargo Collective: 4th Amendment Wear

Read more »

Why I love open source!

December 3, 2010
By
Why I love open source!

Today I had a great reminder of why I love open source software and why I spend a bit of my time contributing R code to several packages. In the vegan, I had included some code to do an analysis … Continue reading →

Read more »

Data Visualization Practices at the New York Times

December 3, 2010
By

Amanda Cox of the New York Times' graphics department recently gave a great presentation to the New Media Days conference in Copenhagen and described how the Times uses data visualizations to reveal patterns, provide context, describe relationships, and even create a sense of wonder about the world. In the video, Amanda demonstrates several of the Times' best interactive visualizations...

Read more »

Data Visualization Practices at the New York Times

December 3, 2010
By

Amanda Cox of the New York Times' graphics department recently gave a great presentation to the New Media Days conference in Copenhagen and described how the Times uses data visualizations to reveal patterns, provide context, describe relationships, and even create a sense of wonder about the world. In the video, Amanda demonstrates several of the Times' best interactive visualizations...

Read more »