Monthly Archives: May 2011

Building R packages for Windows when you don’t use it.

May 2, 2011
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Are you a non-windows user wanting to share your R package with others who do use windows? There's a handy utility (http://win-builder.r-project.org/)that allows you to upload your .tar.gz file and it checks it, builds it, and sends you a link to downl...

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Building R packages for Windows when you don’t use it.

May 2, 2011
By

Are you a non-windows user wanting to share your R package with others who do use windows? There's a handy utility (http://win-builder.r-project.org/)that allows you to upload your .tar.gz file and it checks it, builds it, and sends you a link to downl...

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"Inside" Functors — Evaluating things more than once

May 1, 2011
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"Inside" Functors — Evaluating things more than once

(The examples here work with the version of insidefunctor tagged as "v1")I ran into an interesting problem using "inside" functors.Something is wrong in the following code (well, depending on what you thought it should do).> library(insidefunctor)> `%+.%` = fmap(`+`)> x = seq(0, 10, len = 50)> plot(x,...

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The R Inferno revised

May 1, 2011
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The R Inferno revised

Hell is new and improved. The R Inferno has been revised.  If you don’t know of it, it is a short explanation of a few trouble spots when using the R language.  Somehow the short explanation grew to approach book-length. It can be found at the usual place: http://www.burns-stat.com/pages/Tutor/R_inferno.pdf Major improvements An index has been … Continue reading...

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Here comes the sun

Here comes the sun

The solar irradiance incident outside the earth’s atmosphere is called the extraterrestial or extra-atmospheric irradiance. It is derived from the solar constant only with geometric equations. It can be easily calculated with the calcSol function of the solaR package. With this post I will show an example with some packages from the Spatial task view.

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Bayesian Confidence Intervals: Obama’s ‘That’-Addition and Informality

May 1, 2011
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Bayesian Confidence Intervals: Obama’s ‘That’-Addition and Informality

No “That” Left Behind? I came across a post on Language Log last week giving some evidence that Obama tends to add that to the prepared version of his speeches. For example, in a recent speech at George Washington University, … Continue reading →

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Some rediscovered R scripts from spring cleaning

May 1, 2011
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Some rediscovered R scripts from spring cleaning

Gompertz Model Visualization # Gomperz growth function gomp <- function(x, a, b, k) a*exp(-b*exp(-k*x))   # Normal model with Gompertz mean function likelihood <- function(weight, age, sigma, a, b, k) { mu <- gomp(age, a, b, k) dnorm(weight, mu, sigma) }   # Visualize the model visualize <- function(phi=40, theta=-35) { weight <- seq(0, 250,

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