search for: whitehead

Dear List, I recently asked about any R implementations of Whitehead's methods for sequential clinical trials. Here's the summary of answers so far : 1) There is no R public implementation of those methods 2) There exists an interest for such a package, which does things quite different from Lan-deMets paradigm (shortly : Whitehead's methods allows...

Dear List, I would like to know if there exist some R implementation of John Whitehead's procedures for the planning and analysis of group sequential clinical trials. His book is enlightenig but somewhat frustrating : it has a good basic exposition of his framework, but the technical details are sparse, and leave much work to do when one plans to reuimplement part of the proc...

...he data frame using this bound column. But I can't figure out how to use this column to sort the entire data frame so that the content of the rows remains together. Does anyone know how I can do this? Hints for other ways to approach this problem would also be appreciated. Cheers Amy Amy Whitehead School of Biological Sciences University of Canterbury Private Bag 4800 Christchurch Ph 03 364 2987 ext 7033 Cellphone 021 2020525 Email alw76 at student.canterbury.ac.nz

...cess only that subset of the data-frame with Name == T44. X <- dataframe[dataframe$Name=='T44'] does not work. Any ideas on how to do this? I'm sure I'm missing a simple concept here. Thanks, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

...int (which can be found by interpolation between the 7th and 8th data points). Reportedly, the second formula is not too accurate. However in my case the first formula does not make much sense. Any advice? TIA, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

...23 3 50 13 4 56 98 . . . I would like to plot for the mean and standard error of mean of repeat 1 and repeat2 for each row. Any pointers on how to do this in R? TIA, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

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Hi All- Sorry for this Off-Topic message but is there a method for unsubscribing other than sending email to vorbis-request@xiph.org. My mail server thinks vorbis-request is an invalid username and will not send the mail. Regards, Adam Whitehead E-mail: adam@nwmedia.com.au Phone: +61 (411) 241 120 FAX: +61 (889) 272 965 --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'u...

...at the R forum is mostly a site to discuss issues related to the language, are there any forums that discuss statistical issues? I am specifically interested in the statistical issues in experimental design. TIA, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

Hello, I'm trying to fit a special kind of proportional odds model from: Whitehead et al. (2001). Meta-analysis of ordinal outcome using individual patient data. Statistics in medicine 20: 2243-2260. (model 2) The data are as follows: library(nlme) library(geepack) library(Design) library(MASS) options(contrasts=c("contr.SAS","contr.poly")) counts <...

...nts the first 11111 columns and then prints an error message:[ reached getOption("max.print") -- omitted 27821 rows ]]. is it possible to set the maxprint parameter so that R prints all the rows? tia, anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

...R/lib/Statistics/R.pm>. Would anyone like to share their experience with this Perl-R bridge? I'd like to install it in a Mac OS X. Suggestions on alternate solutions will be appreciated. Thanks in advance, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

I am running Debian on a LAN. I am trying to send popup messages(Winpopup protocol) but just get the same error over and over. We have a WinXP machine named "Mindelessdemon"(He is actually a very nice guy, don't get foolled by the demon stuff), a Win2k machine called "Whitehead" and a win98 machine called "Wyrm". I cant connect to the WinXP or Win2k machine with the messages, but I can connect to the Win98 machine. The programs they are running is the same(RealPopup 2.3 Build 047, compatible with WinPopup and therefore linux) and I got it to work righ...

...command do i use to check of certain packages have been loaded? Also, it seems that most packages come with "vignette"- is this a document that describes the usage of the package? thanks for your help, anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

...rices , A, B, C. Each is an nXn matrix. I need to create matrix D such that : D[i,j]= (A[i,j]+B[i,j]+C[i,j])/3. Being a newbie this is proving to be a challenge. Any ideas on how best to accomplish this? Thanks! Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

I need to uninstall R 2.7.1 from my Mac. What is the best way to uninstall it? Simply delete the R icon in the Applications folder? Or is it more involved? TIA, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

...of the columns. So, here is my data matrix: col1 col2 col3 1 23 34 2 45 56 3 23 56 4 34 68 For each row I would like to calculate the means of the numbers stored in col2 and col3. How can this be done in R? TIA, Anjan -- ============================= anjan purkayastha, phd bioinformatics analyst whitehead institute for biomedical research nine cambridge center cambridge, ma 02142 purkayas [at] wi [dot] mit [dot] edu 703.740.6939 [[alternative HTML version deleted]]

R Experts: I am conducting a meta-analysis where the effect measures to be pooled are simple proportions. For example, consider this data from Fleiss/Levin/Paik's Statistical methods for rates and proportions (2003, p189) on smokers: Study N Event P(Event) 1 86 83 0.965 2 93 90 0.968 3 136 129 0.949 4 82 70 0.854 Total

...r about the array design, using setup2<- init.grid() and then normalize it. Now when we type in setup1<-init.data() we get: "error: couldn't find function!" HELP!!?? Please reply to true at wi.mit.edu if you have any ideas or answers. Thanks, Heather Heather L. True-Krob, Ph.D Whitehead Institute 9 Cambridge Center Cambridge, MA 02142 ph: 617-258-6517 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in th...

Help please- I am running 3.3.1 on Centos using a 10GB network. I get reasonable write speeds, although I think they could be faster. But my read speeds are REALLY slow. Executive summary: On gluster client- Writes average about 700-800MB/s Reads average about 70-80MB/s On server- Writes average about 1-1.5GB/s Reads average about 2-3GB/s Any thoughts? Here are some additional details: