Monthly Archives: December 2009

RQuantLib 0.3.1 released

December 13, 2009
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A new version of RQuantLib is now out at CRAN and in Debian. It updates the package to the 0.9.9 release of QuantLib and is mostly a maintenance release with a few minor fixes along the way.Full changelog details, examples and more details abo...

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RQuantLib 0.3.1 released

December 13, 2009
By

A new version of RQuantLib is now out at CRAN and in Debian. It updates the package to the 0.9.9 release of QuantLib and is mostly a maintenance release with a few minor fixes along the way. Full changelog details, examples and more details about this...

Read more »

RQuantLib 0.3.1 released

December 13, 2009
By

A new version of RQuantLib is now out at CRAN and in Debian. It updates the package to the 0.9.9 release of QuantLib and is mostly a maintenance release with a few minor fixes along the way.Full changelog details, examples and more details abo...

Read more »

Galton’s quincunx in R

December 13, 2009
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Galton’s quincunx in R

Andrej Blejec has a very nice R demo of Galton's quincunx (link1, link2). It is a bit tedious to copy the code from PDF to R console, but it is worth the effort as the demo simulation clearly shows the nature of quincunx. After a bit of search I also f...

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Galton’s quincunx in R

December 13, 2009
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Galton’s quincunx in R

Andrej Blejec has a very nice R demo of Galton's quincunx (link1, link2). It is a bit tedious to copy the code from PDF to R console, but it is worth the effort as the demo simulation clearly shows the nature of quincunx. After a bit of search I also f...

Read more »

CRU graph yet again (with R)

December 13, 2009
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CRU graph yet again (with R)

IowaHawk has a excellent article attempting to reproduce the infamous CRU climate graph using OpenOffice: Fables of the Reconstruction. We thought we would show how to produced similarly bad results using R. If the re-constructed technique is close to what was originally done then so many bad moves were taken that you can’t learn muchRelated posts:

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The Most Basic Elements of Object-Oriented Programming in R

December 13, 2009
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Until recently, I’ve never had any reason to learn how to define my own classes in R. Having learned this week, I was surprised to find out how easy it is to start implementing classes in R. If you know nothing about creating classes and class methods in R, here’s a very quick overview of

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Missing data imputation

December 12, 2009
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Missing data imputation

Probably all of us have met the issue of handling missing data, from the basic portfolio correlation matrix estimation, to advanced multiple factor analysis, how to impute missing data remains a hot topic. Missing data are unavoidable, and more encompassing than the ubiquitous association of the term, irgoring missing data will generally lead to biased estimates. The...

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A central hub for R bloggers

December 12, 2009
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A central hub for R bloggers

I would like to suggest to my readers to take a look and bookmark a new blog named R-bloggers which aims to be "a central hub of content collected from bloggers who write about R".It seems a nice idea to me to have a centralized source of information f...

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A central hub for R bloggers

December 12, 2009
By
A central hub for R bloggers

I would like to suggest to my readers to take a look and bookmark a new blog named R-bloggers which aims to be "a central hub of content collected from bloggers who write about R".It seems a nice idea to me to have a centralized source of information f...

Read more »