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...yeta, PhD Ceann Cúntóir, Scoil Eolaíocht an Bhia agus Sláinte an Chomhshaoil Assistant Head, School of Food Science and Environmental Health, Coláiste Eolaíochtaí agus Sláinte/ College of Sciences and Health, Institiúid Teicneolaíochta Átha Cliath/ Dublin Institute of Technology, Sráid Chathal Brugha, Baile Átha Cliath 1, Éire/Cathal Brugha Street, Dublin 1, Ireland F: +353-1-4024459 E: <mailto:james.curtin@dit.ie> jesus.frias@dit.ie W: http://fseh.dit.ie/o4/StaffListing/JesusFrias.html Tá an teachtaireacht seo scanta ó thaobh ábhar agus víreas ag Seirbhís Scanta Ríomhphost de...

...tem i386, mingw32 status major 1 minor 9.0 year 2004 month 04 day 12 language R -------------------------------------------------------------- Jes??s Mar??a Fr??as Celayeta School of Food Sci. and Env. Health. Faculty of Tourism and Food Dublin Institute of Technology Cathal Brugha St., Dublin 1. Ireland t +353 1 4024459 f +353 1 4024495 w www.dit.ie/DIT/tourismfood/science/staff/frias.html -------------------------------------------------------------- -- This message has been scanned for content and viruses by the DIT Information Services MailScanner Service, and is bel...

Last week (Wed 9/10/2003, "regression questions") I posted a question regarding the use of gnls( ) and its dissimilarity to the syntax that nls( ) will accept. No one replied, so I partly answered my own question by constructing indicator variables for use in gnls( ). The code I used to construct the indicators is at the end of this email. I do have a nagging, unanswered

...ot;ID ",direction="long") Could anybody give me some help? thanks in advance, Jesus -------------------------------------------------------------- Jes??s Mar??a Fr??as Celayeta School of Food Sci. and Env. Health. Faculty of Tourism and Food Dublin Institute of Technology Cathal Brugha St., Dublin 1. Ireland t +353 1 4024459 f +353 1 4024495 w www.dit.ie/DIT/tourismfood/science/staff/frias.html -------------------------------------------------------------- -- This message has been scanned for content and viruses by the DIT Information Services MailScanner Service, and is bel...

...te that changes from experiment to experiment. The model does not take very well pHinf. regards, Jesus -------------------------------------------------------------- Jes?s Mar?a Fr?as Celayeta School of Food Sci. and Env. Health. Faculty of Tourism and Food Dublin Institute of Technology Cathal Brugha St., Dublin 1. Ireland t +353 1 4024459 f +353 1 4024495 w www.dit.ie/DIT/tourismfood/science/staff/frias.html -------------------------------------------------------------- -- This message has been scanned for content and viruses by the DIT Information Services MailScanner Service, and is be...

...idth.cutoff of the function and I wonder of there is any more elegant way to do it. regards, Jesus -------------------------------------------------------------- Jes??s Mar??a Fr??as Celayeta School of Food Sci. and Env. Health. Faculty of Tourism and Food Dublin Institute of Technology Cathal Brugha St., Dublin 1. Ireland t +353 1 4024459 f +353 1 4024495 w www.dit.ie/DIT/tourismfood/science/staff/frias.html -------------------------------------------------------------- -- This message has been scanned for content and viruses by the DIT Information Services MailScanner Service, and is bel...

...f cuts in each of the trellis. I can make each of the contourplots separately and control the number of cuts but I am not able to plot all of them in one. Thanks in advance, Jesus Jes??s Mar??a Fr??as Celayeta School of Food Science and Environmental Health Dublin Institute of Technology Cathal Brugha St. Dublin 1 p + 353 1 4024459 f + 353 1 4024495 w http://www.dit.ie/DIT/tourismfood/science/ -- This message has been scanned for content and viruses by the DIT Information Services MailScanner Service, and is believed to be clean. http://www.dit.ie

I got a question from a fellow PhD student that work with spectrum analysis in Excel and now he has lots of spectrums that needs to be smoothed, which would be nice to be able to do in batch. Is there an R package that can do: Savitzky-Golay smoothing for reflectance spectral data or a function that does something similar. _______________________________________ Henrik Andersson

Hi there, I'm trying to fit a growth curve to some data and need to use a weighted least squares estimator to account for heteroscedasticity in the data. A weights argument is available in nls that would appear to be appropriate for this purpose, but it is listed as 'not yet implemented'. Is there another package which could implement this procedure? Regards, Robert Brown

Dear Colleagues, Our group is also working on implementing the use of R for pharmacokinetic compartmental analysis. Perhaps I have missed something, but > fit <- nls(noisy ~ lsoda(xstart, time, one.compartment.model, c(K1=0.5, k2=0.5)), + data=C1.lsoda, + start=list(K1=0.3, k2=0.7), + trace=T + ) Error in eval(as.name(varName), data) : Object

Does someone out there have an example of R-code for a split-split plot ANOVA using aov or another function? The design is not balanced. I never set up one in R before and it would be nice to see an example before I tackle a very complex design I have to model. Thanks, Mike Mike Saunders Research Assistant Forest Ecosystem Research Program Department of Forest Ecosystem Sciences University of