I've been running for the last couple of months a lot of simulations written in R on legion cluster here at UCL. But I still do many things on our quad-core server here at the institute, and parallelising the simulations is extremely handy.S...

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I've been running for the last couple of months a lot of simulations written in R on legion cluster here at UCL. But I still do many things on our quad-core server here at the institute, and parallelising the simulations is extremely handy.S...

I've been using an OceanOptics USB4000 spectrometer in research on biomass accumulation and climate in South Africa. This post presents a R function that will read in JCAMP files from the SpectraSuite software and output a vector of reflectance values. SpectraSuite can convert binary output files to JCAMP files if they weren't saved as JCAMP. You...

We're having problem with starting values in glm(). A very simple logistic regression with just an intercept with a very simple starting value (beta=5) blows up....

The bigmemory is an excellent package for handling big matrix in R. There are several sister packages provided by "The Bigmemory Project": biganalytics for analysis, bigtabulate for tabulation, bigalgebra for linear algebra functionality, synchronicity for synchronization via mutexes and interprocess communication and message passing.biganalytics provides a few functions for analysis: linear regression model, generalized linear regression model, and...