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Hi Nguyen, > Subject: [R] install "multtest" and "preprocessCore" packages in > Bioconductor library > Date: Wed, 30 Nov 2011 09:57:36 -0800 > From: UyenThao Nguyen <unguyen at tethysbio.com> > To: r-help <r-help at r-project.org> > CC: uth.nguyen at ucdavis.edu <uth.nguyen at ucdavis.edu> > > Hi All, > > I've tried to install these "multtest" and "preprocessCore" packages in Mac, > but kept getting error messages. I tried...

Greetings, I have been playing around with the R/Parallel package, which can farm out the computation of a for-loop among multiple worker processes. Each worker gets a chunk of the for-loop iterations; for example, if you have two workers and for(x in 1:1000){...}, one worker would typically get iterations 1:500, while the second does 501:1000. I would like to be able to preallocate matrices to

Hi, I am trying to fit a 4p logistic to this data, using nls function. The function didn't freely converge; however, it converged if I put a lower and an upper bound (in algorithm port). Also, the b1.A parameter always takes value of the upper bound, which is very strange. Has anyone experienced about non-convergent of nls and how to deal with this kind of problem? Thank you very much.