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Hi all, I am wondering if do exist a function in R that allow me to sample or choose randomly the rows (i.e., samples) inside a given matrix. Thank you very much in advance. Cheers, -- Gian [[alternative HTML version deleted]]

Hello R community, I have a question regarding correlation and regression analysis. I have two variables, x and y. Both have a standard deviation of 1; thus, correlation and slope from the linear regression (which also must have an intercept of zero) are equal. I want to probe two particular questions: 1) Is the slope significantly different from zero? This should be easy with the lm

...] stats     graphics  grDevices utils     datasets  methods   base      other attached packages: [1] ensembleBMA_5.0.3 chron_2.3-42      loaded via a namespace (and not attached): [1] tools_2.15.1     Anna Freni Sterrantino Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. ________________________________ Da: Chris Fraley <fraley@washington.edu> Inviato: Giovedì 12 Luglio 2012 17:42 Oggetto: Re: ensembleBMA pit function warnings Dear Anna Freni Sterrantino,       I'll get to this as soon as I can. I'm still maintaining ensembleBMA because ther...

Hello, I have a matrix with the distances among sites. And I have another matrix with the presence and absence of each species in each site. I would like to test the spatial autocorrelation among sites. I have tried to use the function gearymoran of the ade4 package, but error messages keep popping up. Do you know any function for me to test the spatial autocorrelation of my data? Thanks,

...39;d like to create a vector that has this kind of numeration 001 002 003 . . . 099 I have looked at format help page but couldn't get any hint on how to do it. Thanks Anna Anna Freni Sterrantino Ph.D Student Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. [[alternative HTML version deleted]]

...a b c d e f a1 1 1 ..... b2 NA 2 ..... c3 NA NA d4 2 3 e5 3 4 ...... Any suggestion , Thank you Anna Anna Freni Sterrantino Ph.D Student Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. [[alternative HTML version deleted]]

...es utils     datasets  methods   base      other attached packages: [1] ensembleBMA_5.0.3 chron_2.3-42      loaded via a namespace (and not attached): [1] tools_2.15.0 Any suggestion? Anna Freni Sterrantino Ph.D Student Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. [[alternative HTML version deleted]]

...s.org/doku.php?id=guides:tutorials:regression:table I tried to replicate using qbinom the results obtained in  > invbinomial(10,5, 0.5) >.54830584 but with no success. Thank you Cheers Anna Anna Freni Sterrantino Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. [[alternative HTML version deleted]]

Dear all, I have a dataset representing several geographical points (locations), each one having a specific value after performing a PCA. Now I'm trying to understand how to separately represent on a geographic map (of Europe) the pattern of PC1,2, ecc.with colors (e.g.heatmap) I have to add that the dataset includes relatively few points. Therefore, I would also like to interpolate the values

I have a problem that Wine cannot launch "child" applications,Here is what I mean. I can run applications directly using wine at the command line, eg: wine reversi.exe works fine. But if I try to run the same application via winefile by browsing to the directory and then double clicking the application, then I get an error message: "File not found". Also I get the

Hi, I am writing this in a wrong way, can someone please correct me? > A <- matrix() > length(A) <- 6 > dim(A) <- c(3,2) > colnames(A) <- c("X","Y") > A X Y [1,] NA NA [2,] NA NA [3,] NA NA > A$X Error in A$X : $ operator is invalid for atomic vectors > Thanks, cruz

Hi, I am very new to R and wanted to know if there is a package that, given very long nucleotide sequences, searches and identifies short (7-10nt) motifs.. I would like to look for enrichment of certain motifs in genomic sequences. I tried using MEME (not an R package, I know), but the online version only allows sequences up to MAX 60000 nucleotides, and that's too short for my needs..

I had the dom0 which unfortunately didn''t have a console on it hit a race condition and saw oom errors on it also. This happened after it was running for over 36 hours with a domU whose load average was avg was around 3 most of the time. changeset: 7396:9b51e7637676 Dom0 - UP i686, Centos 4.1, 768 megs domU-1 92 megs snmpd domU-2 92 megs snmpdd domU-3 410 megs postgres, tomcat 5.5,

Hi Everyone, I was hoping someone could help me with the settings for Tinn-R. I see in the screen shots that it has syntax help, or something similar (tips on what functions, etc). I can not seem to get this to turn on in the program, and I am wondering if I have to set up a few options. I quickly read through the help and could not figure it out. Many thanks! - Brock P.S. It appears as

Hi, I'm a new user. I've been reading through the manual and looking at various examples but am still trying to make sense of the most efficient ways to handle matrices of data. If I have a 2D matrix of data, how do I get the mean, min, max value of each row? I see the "mean" function on a matrix will give me averages by row, but min and max give me the value for the entire

Hi, Why this function doesn't work? function (x) { if (is.factor(x)) { if (!is.ordered(x)) { warning("La mediana non si puo' calcolare!!!") return(NA) } me <- median(unclass(x)) if (me - floor(me) != 0) { warning("Mediana indeterminata") return(NA) } else

Hi everybody, I am trying to fit a GAM model without intercept using library mgcv. However, the result has nothing to do with the observed data. In fact the predicted points are far from the predicted points obtained from the model with intercept. For example: #First I generate some simulated data: library(mgcv) x<-seq(0,10,length=100) y<-x^2+rnorm(100) #then I fit a gam model with

...kages: [1] rms_3.1-0 Hmisc_3.8-3 survival_2.36-2 loaded via a namespace (and not attached): [1] cluster_1.13.2 grid_2.12.1 lattice_0.19-13 tools_2.12.1 Many thanks Anna Anna Freni Sterrantino Ph.D Student Department of Statistics University of Bologna, Italy via Belle Arti 41, 40124 BO. [[alternative HTML version deleted]]

I have a FreeBSD 4.8-Release machine that I upgraded from a 4.5 or 4.4 machine. It works just great for about 9 days, then processes will not die. It starts to become a problem when I can't kill processes, restart services, connections hang, and I can't reboot or shutdown, I have to do a hard reset. I can't really find anything in the logs to indicate what is giving me