1961 search results for "Twitter"

In case you missed it: August Roundup

September 20, 2010
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In case you missed them, here are some articles from August of particular interest to R users. We noted that R had a key role in the US government's reaction to the BP oil spill, as related by the Statistical Engineering division chief at NIST. We linked to an example of creating an animation in Google Earth based on...

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How fast is JAGS?

September 20, 2010
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How fast is JAGS?

The OpenBUGS development team have created some validation code called WinComp that allows the results of OpenBUGS to be compared with WinBUGS 1.4 for all the examples in the OpenBUGS manual.  I have wrapped up this code into an R … Continue reading →

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Installing ‘intergraph’ package

September 17, 2010
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Installing ‘intergraph’ package

After some e-mails I decided to put together a bit more detailed instruction how to install the ‘intergraph’ package together with the namespaced version of the ‘network’ package. See here. There seemed to be some problems with downloading the namespaced ‘network’ from my webstite (thanks Neil!). File permissions were set incorrectly. I fixed that and

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Typo in Example 3.6

September 16, 2010
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Typo in Example 3.6

Edward Kao pointed out the following difficulty about Example 3.6 in Chapter 3 of “Introducing Monte Carlo Methods with R”: I have two questions that have puzzled me for a while. I hope you can shed some lights. They are all about Example 3.6 of your book. 1. On page 74, there is a term

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Complex-valued linear models

September 16, 2010
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Complex-valued linear models

Someone has probably already written code to do this. But I couldn’t find it in CRAN, so here goes. Oh no lm() won’t take complex numbers! (or rather, it’ll take them, but it’ll discard the imaginary part.) Easy enough fix. … Continue reading →

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Three dimensional plots using rgl package

September 15, 2010
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Three dimensional plots using rgl package

We all know that R can do amazing things including 3 dimensional plots. scatterplot3d is probably the most popular package for doing this. But a few days ago I got introduced with rgl package which can do 3 dimensional graphs with some added advantages like we can rotate the plot using mouse, zoom in or out using the mouse...

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News on MCMSki III

September 14, 2010
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News on MCMSki III

Here is a message sent by the organisers of MCMSki III in Utah next early January. When registering, make sure to tick the free registration for Adap’skiii as well! The fourth joint international meeting of the IMS (Institute of Mathematical Statistics) and ISBA (International Society for Bayesian Analysis), nicknamed “MCMSki III“, will be held at

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Which functions in R base call internal code?

September 14, 2010
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Which functions in R base call internal code?

In a recent question on Stack Overflow about speeding up group-by operations, Marek wondered which functions called .Internal code (and consequently were fast). I was surprised to see that there appears to be no built-in way to check whether or not this is the case (though is.primitive is available for primitive functions).Writing such a function is quite straight forward....

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Some useful bar plots using R

September 14, 2010
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Some useful bar plots using R

In this article I am trying to show how to produce bar plots using R. Many of my friends think SPSS is the most useful software for producing plots and they keep using it (some of them even use Excel!). My goal is to show that R can do every type of g...

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10w2170, Banff [2]

September 13, 2010
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10w2170, Banff [2]

Over the two days of the Hierarchical Bayesian Methods in Ecology workshop, we managed to cover normal models, testing, regression, Gibbs sampling, generalised linear models, Metropolis-Hastings algorithms and of course a fair dose of hierarchical modelling. At the end of the Saturday marathon session, we spent one and half discussing some models studied by the

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