similar to: Help installation lme4a,

Dear R users, I recently downloaded the library lme4a by svn checkout svn://svn.r-forge.r-project.org/svnroot/lme4. I tried to install the library lme4a by copying the downloaded document in the location where all the R libraries are saved. When I try to load the library, I obtain the message library(lme4a) Error in library(lme4a) : 'lme4a' is not a valid installed package R version

Greetings, I have generated several ROC curves and would like to compare the AUCs. The data are cross sectional and the outcomes are binary. I am testing which of several models provide the best discrimination. Would it be most appropriate to report AUC with 95% CI's? I have been looking in to the "net reclassification improvement" (see below for reference) but thus far I can only

I'm sure this is simple enough, but an R site search on my subject terms did suggest a solution. I have a numeric vector with many values that I wish to create a factor from having only a few levels. Here is a toy example. > x <- 1:10 > x <-

? stato filtrato un testo allegato il cui set di caratteri non era indicato... Nome: non disponibile URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20101119/262372bf/attachment.pl>

Dear R users, I am not asking questions specifically on R, but I know there are many statistical experts here in the R community, so here it goes my questions: Freedman (1982) propose an approximation of sample size/power calculation based on log-rank test using the formula below (This is what nQuery does): (Z(1-?/side)+Z(power))^2*(hazard.ratio+1)^2 N =

Hello. I am posting this on behalf of a student in my class. I have been introducing them to R. I suspect that the problem I need help with is not so much an R issue, but a MAC config issue, but I don't have enough MAC experience to know what to do. Anyway, on to the problem. We are using Frank Harrell's Hmisc and Design packages. This student also wishes to use the latex formatting

I was messing around with some data in R and SAS (the reason is unimportant) fitting a multiple linear regression and got a curious discrepancy. The data set is too big to post, but if someone wants it, I can send it. So, here are the (partial) results: From R: Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 61.11434 1.48065 41.275 < 2e-16 *** sexWomen

Hi - I am conducting a meta-analysis and I have a matrix of f-statistics, Ns and dfs from a series of studies that tested for an interaction in a 2x2 anova. I'd like to test whether the 2x2 interaction is significant in the aggregate. Similarly, I have a matrix of chi-square statistics that I'd like to meta-analyze. How can I input these test statistics into the "metafor"

Hi, ESS replaces "_" by "<-". How can I switch off this feature? I need to be able to type the underscore Thanks Eryk -- Witold Eryk Wolski Heidmark str 5 D-28329 Bremen tel.: 04215261837

I have two matrices A and B > dim (A) [1] 30380   104 > dim(Bt) [1] 30380    63 I want to  combine both A and B to matrix C where >dim(C) [1] 30380   167 How do I do that ? Regards, Pankaj Barah Department of Biology, Norwegian University of Science & Technology (NTNU) Realfagbygget, N-7491 [[alternative HTML version deleted]]

Hello, TO update R under Ubuntu on my macchine, I downloaded R-2.13.1. When running ./configure, I got the following error message: checking for X... no configure: error: --with-x=yes (default) and X11 headers/libs are not available But I could use X11() function in R-2-10. So where does the problem come from? Cheers, Carol

Hi, I am attempting to graph a Kaplan Meier estimate for some claims using the survfit function. However, I was wondering if it is possible to plot a cdf of the kaplan meier rather than the survival function. Here is some of my code: library(survival) Surv(claimj,censorj==0) survfit(Surv(claimj,censorj==0)~1) surv.all<-survfit(Surv(claimj,censorj==0)~1) summary(surv.all) plot(surv.all)

Dear All I can not download R for Linux. I do not know which file I should install? Best Regards, Soheila

To enhance my understanding, and that of my students, I have a question about cox.zph in the survival package. If I have correctly gleaned the high-level point from the 1994 Biometrika paper of Grambsch and Therneau, it looks to me like cox.zph provides a mechanism to test for a simple trend in plots of a function of time, g(t) versus the scaled schoenfeld residuals and it also provides some

Hey all, I learned that using the equals sign "=" to assign objects is generally OK, but will not work in some cases. As I always use "<-" for assignments, I have not encoutered any problems. Could somebody provide an example or explanation, why getting used to "=" is not a good idea? Or is it? Thanks ahead, Berry ------------------------------------- Berry

I tried to use write.foreign() to export to SAS this morning and got an error. When I looked at the code for writeForeignSAS() I saw this line: dfn < -df which I think should be dfn <- df So, I tried to run update.packages() to see if there was an updated version and got the following result. > update.packages(c("foreign")) Warning message: In list.files(lib) :

Dear community, I encountered a very disturbing phenomenon today: When I try to fit any gam() with mgcv R aborts. I could not find any post regarding this in google, which mades in even more strange. I am using the latest Ubuntu, latest R and latest mgcv everything up to date. The crash occured too with the last mgcv 1.7-11. This is the output from the R shell: <pre> R version 2.14.0

I just upgraded to version 2.1.1 (from 2.0.1) today. > R.version _ platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 2 minor 1.1 year 2005 month 06 day 20 language R I am using SuSE 9.2 and did the upgrade using rpm -U with the RPM available on CRAN. After upgrading r-base, I ran update.packages(). Four previously

I downloaded R-Patched today (to see if another problem I want to ask about is still present or if its just me - as per the posting guide). I ran "tools/rsync-recommended" successfully. I then ran "configure --enable-R-shlib" successfully. Then make stops with the following error. gcc -shared -L/usr/local/lib -o tools.so text.o init.o Rmd5.o md5.o -L../../../../lib -lR

Greetings, I am recoding a dummy variable (coded 1,0) so that 0 = 2. I am using the line sciach$dummyba[sciach$ba==0] <- 2 I notice that it creates a new column dummyba, with 0 coded as 2 but with 1's now coded as NA. Is there a simple way around this in the line I am using, or do I need to have an additional line sciach$dummyba[sciach$ba==1] <- 1 Thanks in advance. David