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Creating an R package, using developer/productivity tools

October 27, 2011 | Szilard

Couple of R programming (mainly infrastructure/workflow) related topics discussed at the Los Angeles R users group in a tutorial/demo-like form (targeted mainly to beginners) by Szilard Pafka and Jeroen Ooms: how easy it is to create a simple package for … Continue reading →

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Quality comparison of floating-point maths libraries

April 10, 2011 | Derek-Jones

What is the best way to compare the quality of floating-point math libraries (e.g., sin, cos and log)? The traditional approach for evaluating the quality of an algorithm implementing a mathematical function is based on mathematics; methods have been developed to calculate the maximum error between the calculated and ... [Read more...]

Variations in the literal representation of Pi

March 11, 2010 | Derek-Jones

The numbers system I am developing attempts to match numeric literals contained in a file against a database of interesting numbers. One of the things I did to quickly build a reasonably sized database of reliable values was to extract numeric literals from a few well known programs that I ...

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testing

Creating an R package, using developer/productivity tools

Quality comparison of floating-point maths libraries

Variations in the literal representation of Pi

testing

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