# Monthly Archives: June 2013

June 13, 2013
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Google's prediction API offers a blackbox way of doing some prediction. They had advertised an R package, but it doesn't seem to work with the new version of the prediction API or their OAuth2 authentication mechanism. So, in an effort to check out the...

## type = “what?”

June 13, 2013
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One great thing about R is that has a wide diversity of packages written by many different people of many different viewpoints on how software should be designed. However, this does tend to bite us periodically.  When I teach newcomers about R and...

June 13, 2013
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## Le Monde puzzle [#824]

June 13, 2013
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A rather dull puzzle this week: Show that, for any integer y, (√3-1)2y+(√3+1)2y is an integer multiple of a power of two. I just have to apply Newton’s binomial theorem to obtain the result. What’s the point?! Filed under: Books, Kids, R Tagged: Binomial theorem, Isaac Newton, Le Monde, mathematical puzzle

## More code and images from “Displaying time series, spatial and space-time data with R”

My book continues growing. I have recently completed the first version of the Spatio-Temporal visualization chapters. Moreover, a significant part …Continuar leyendo »

## New version of solaR

I have updated my package solaR. This package provides calculation methods of solar radiation and performance of photovoltaic systems from …Continuar leyendo »

## Advanced settings in ggplot2 (R)

June 13, 2013
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Here is a post with some information to control the layout of your graph produced by the ggplot library: http://rpubs.com/Lionel/6557 Enjoy!Filed under: R and Stat Tagged: ggplot, R

## inline 0.3.12

June 12, 2013
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Another maintenance release of inline is now on CRAN and in already included in Debian. This release was triggered by a change in the development version of R which removed an argument to package.skeleton(). The complete NEWS entry is below. Chan...

## The null model for age effects with overdispersed infection

June 12, 2013
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$\inline k$

How does overdispersion of infections affect the behavior of the multiple-infection model? I redefine the model to account for overdispersion, assuming the same overdispersion occurs in both age classes. The parameter varies inversely with the degree of overdispersion. Again, the classes are demographically identical, and infection affects mortality but not growth: \[\begin{aligned} \frac{dJ}{dt}...

## Mini-tutorial for Quandl: How to access financial data with R

June 12, 2013
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by Joseph Rickert Quandl.com, the open source website for financial data, made rapid progress earlier this year in becoming an R friendly source for financial time series data. Tammer Kamel, Quandl’s founder introduced the site on Revolutions blog in late February as a “search engine” for numerical data and explained how Quandl’s “Q-bot” can take data from almost any...