search for: aventi

...r these objects (or maybe there's already a conversion available for lm?). I assume that the data do not need to be analyzed with a any other software than R. I'm happy for any suggestions and links to get some more info on this. kid regards, Arne -- Arne Muller, Ph.D. Toxicogenomics, Aventis Pharma arne dot muller domain=aventis com

...of Windows (see <http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx>). ------------------------------------------------------------------------------------ Thank you in advance for any help you might be able to provide, Karen --- Karen M. Green, Ph.D. Karen.Green@sanofi-aventis.com Research Investigator Drug Design Group Sanofi Aventis Pharmaceuticals 1580 E. Hanley Blvd. Tucson, AZ 85737-9525 [[alternative HTML version deleted]]

...be rof replicates within each cell (even though not balanced). However, since I've only 0 to 4 replicates I'm worried that the standard anova may not be the way to go. Are there special packages for unbalanced designs like this? kind regards, Arne -- Arne Muller, Ph.D. Toxicogenomics, Aventis Pharma arne dot muller domain=aventis com

...uot;drplot" to graph my data I get an error. The message is: Error in plot.window(xlim, ylim, log, asp, ...) : need finite 'xlim' values If someone could please tell me what I am doing wrong, I would much appreciate it. Thank you and have a blessed day. Eugene Glover Sanofi-Aventis 26 Landsdowne St 4th floor Cambridge MA 02139 617-768-4079 [[alternative HTML version deleted]]

...to fit a beta distribution for a dataset using fitdistr(MASS). I am having difficulties with it because the function tends to fit a distribution with a range of 0 to 1 (I guess). However, my dataset is not! Anytips or tricks will be very much appreciated. Many Thanks. T. S. Ramanarayanan, Ph.D. Aventis CropScience Research Triangle Park, NC 27709 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", n...

Dear All, I'm trying to read a text data file that contains several records separated by a blank line. Each record starts with a row that contains it's ID and the number of rows for the records (two columns), then the data table itself, e.g. 123 5 89.1791 1.1024 90.5735 1.1024 92.5666 1.1024 95.0725 1.1024 101.2070 1.1024 321 3 60.1601 1.1024 64.8023 1.1024 70.0593

Hello, I've a data frame with 15 colums and 6000 rows, and I need the data in a single vector of size 90000 for ttest. Is there such a conversion function in R, or would I have to write my own loop over the colums? thanks for your help + kind regards Arne

Hi All, I've the following data frame with 54 rows and 4 colums: > x Ratio Dose Time Batch R.010mM.04h.NEW 0.02 010mM 04h NEW R.010mM.04h.NEW.1 0.07 010mM 04h NEW ... R.010mM.24h.NEW.2 0.06 010mM 24h NEW R.010mM.04h.OLD 0.19 010mM 04h OLD ... R.010mM.04h.OLD.1 0.49 010mM 04h OLD R.100mM.24h.OLD 0.40 100mM 24h OLD I'd

Hello, A collegue of mine has compared the runtime of a linear model + anova in SAS and S+. He got the same results, but SAS took a bit more than a minute whereas S+ took 17 minutes. I've tried it in R (1.9.0) and it took 15 min. Neither machine run out of memory, and I assume that all machines have similar hardware, but the S+ and SAS machines are on windows whereas the R machine is Redhat

Hello, I got stuck with a graphics question: I've 3 figures that I present on a single page (window) via 'layout'. The layout is layout(matrix(c(1,1,2,3), 2, 2, byrow=TRUE)); so that the frst plot spans the both columns in row one. Now I'd like to magnify the fist figure so that it takes 20% more vertical space (i.e. more space for the y-axis). How would I do this in R?

Hello, I was wondering wether there's a function in R that takes two vectors (of same length) as input and computes mean values for bins (intervals) or even a sliding window over these vectros. I've several x/y data set (input/response) that I'd like plot together. Say the x-data for one data set goes from -5 to 14 with 12,000 values, then I'd like to bin the x-vector in steps of

...olor? In R 2.0.1 Patched (2004-11-17), it produced very pretty output: ## pictex(file = "modern-metatheonomy.tex", bg = "transparent"); ## plotData(data); ## dev.off() ... but it appears to have ignored all color information. __________ Steve Rowley <steve.rowley at sanofi-aventis.com> Cambridge, MA: (617) 768-4054 ICQ: 52-377-390

What is the correct form to write statement meaning: if (a==1) {b=2; c=3}; else {b=0; c=0}; Thank you Jue Wang, Biostatistician Contracted Position for Preclinical & Research Biostatistics PrO Unlimited (908) 231-3022

...********************* ********** QUESTION: Is anyone aware of a randomization t-test function in R? ************************************************************************ ********** Thank you for your help, Karen --- Karen M. Green, Ph.D. Research Investigator Drug Design Group Sanofi Aventis Pharmaceuticals 1580 E. Hanley Blvd. Tucson, AZ 85737-9525 USA [[alternative HTML version deleted]]

...ectors are >1300 elements long. I couldn't find a more compact form of storage that I is still easy to explore afterwards. Suggestions on how to get this done more efficiently (in terms of memory) are greatfully received. kind regards, Arne -- Arne Muller, Ph.D. Toxicogenomics, Aventis Pharma arne dot muller domain=aventis com

Hello, I'm trying to find out the optimal number of splits (mtry parameter) for a randomForest classification. The classification is binary and there are 32 explanatory variables (mostly factors with each up to 4 levels but also some numeric variables) and 575 cases. I've seen that although there are only 32 explanatory variables the best classification performance is reached when

Hello, I've come across the following situation in R-1.8.1 (compile + running under RedHat 7.1): > phyper(24, 514, 5961-514, 53, lower.tail=T) [1] 1 > phyper(24, 514, 5961-514, 53, lower.tail=F) [1] -1.037310e-11 I'd expect the later to be 0 or some very small positive number. Is this a number under-flow of the calculation? Do you think I'm safe if I just set the result to 0

Hello, I've a very long character array (>500k characters) that need to split by '\n' resulting in an array of about 60k numbers. The help on strsplit says to use perl=TRUE to get better formance, but still it takes several minutes to split this string. The massive string is the return value of a call to xmlElementsByTagName from the XML library and looks like this: ... 12345

...quot;density")),MyMixtureModel)) ################## # (4) plot components ################## ??? Any information you might be able to shed on this would be very much appreciated. With appreciation for your help, Karen --- Karen M. Green, Ph.D. Research Investigator Drug Design Group Sanofi Aventis Pharmaceuticals Tucson, AZ USA [[alternative HTML version deleted]]

Hello, thanks for the tips on updating packages for 1.8.0. The updating is a real problem for me, since I've to do it sort of manually using my web-browser or wget. I'm behind a firewall that requires http/ftp authentification (username and passwd) for every request it sends to a server outside our intranet. Therefore all the nice tools for automatic updating (cran, cpan ...) don't