Monthly Archives: November 2010

Example 8.13: Bike ride plot, part 2

November 8, 2010
By
Example 8.13: Bike ride plot, part 2

Before explaining how to make and interpret the plot above, Nick and I want to make a plea for questions--it's hard to come up with useful questions to explore each week!As shown in Example 8.12, data from the Cyclemeter app can be used to make interes...

Read more »

The NYC Marathon

November 8, 2010
By
The NYC Marathon

New York’s annual marathon took place yesterday. Watching a bit of it on television with my friends, I was struck by the much earlier starting time for women than men. Specifically, professional women started running yesterday at 9:10 AM, while professional men start running at 9:40 AM. (This information comes from the runner’s handbook.) I

Read more »

R Beginner’s Guide Book Update: Statistical Analysis with R Released

November 8, 2010
By
R Beginner’s Guide Book Update: Statistical Analysis with R Released

In the final days of October, my beginner's guide to R was released. The book's official title is Statistical Analysis with R and it can be found on the Packt Publishing website. The primary focus of Statistical Analysis with R is helping new users bec...

Read more »

R Beginner’s Guide Book Update: Statistical Analysis with R Released

November 8, 2010
By
R Beginner’s Guide Book Update: Statistical Analysis with R Released

In the final days of October, my beginner's guide to R was released. The book's official title is Statistical Analysis with R and it can be found on the Packt Publishing website. The primary focus of Statistical Analysis with R is helping new users bec...

Read more »

A R wrapper for Google Prediction API

November 8, 2010
By
A R wrapper for Google Prediction API

Since I got the chance to access to both Google Storage for Developers and Google Prediction API (more details here and here), I decided to create a simple wrapper (just 4 basic functions until now) to be capable to play with the Google Prediction API ...

Read more »

A R wrapper for Google Prediction API

November 8, 2010
By
A R wrapper for Google Prediction API

Since I got the chance to access to both Google Storage for Developers and Google Prediction API (more details here and here), I decided to create a simple wrapper (just 4 basic functions until now) to be capable to play with the Google Prediction API ...

Read more »

Le Monde puzzle [43]

November 7, 2010
By
Le Monde puzzle [43]

Here is the puzzle in Le Monde I missed last week: Given a country with 6 airports and a local company with three destinations from each of the six airports, is it possible to find a circular trip with three intermediate stops from one of the airports? From all of the airports? One more airport

Read more »

Wetbulb Temperature

November 7, 2010
By
Wetbulb Temperature

This google map display is just one of 230 GHCN stations that is located in the water. After finding  instances of this phenomena over and over, it seemed an easy thing to find and analyze all such cases in GHCN. The issue matters for a two reasons: In my temperature analysis program I use a

Read more »

Updating meteorological forecasts, part 1

November 7, 2010
By
Updating meteorological forecasts, part 1

As Mark Twain said "the art of prophecy is very difficult, especially about the future" (well, actually I am not sure Mark Twain was the  first one to say so, but if you're interested by that sentence, you can look here). I have been rather su...

Read more »

R is a cool image editor!

November 7, 2010
By
R is a cool image editor!

Here I present some functions I wrote to recreate some of the most common image effect available in all image editor.They require the library rimage.To load the image, use:y <- read.jpeg("path")To display the image, use:plot(y)Original imageSepia tonergb2sepia <- function(img){ iRed <- img*255 iGreen <- img*255 iBlue <- img*255  oRed <- iRed * .393...

Read more »