similar to: character manipulation

Dear R'helpers, I guess the solution is trivial but despite some hours of testing and looking at the doc, I was unable to fix the following problem. I want to do either: for (i in 1:lat) a[i,which(a[i,]==0] <- NA or: for (i in 1:lat) a[i,which(a[i,]==-9999|a[i,]==9999|a[i,]==9998|a[i,] ==-9998)] <- NA if the word "Time" is or is not present in variable

Dear R'Helpers and Colleagues, I have looked in the documentation, asked to some colleagues in the lab, but was unable to solve the following difficulty. I am running R on a iMac G5 with OS 10.4. The file below (73 rows x 144 col) shows the values of a climatic index on the globe with a grid of 2,5 ? x 2,5 ? (NA = no value): ? With image() and map() and running the following

Hi! I am trying to install in my R environment the rhdf5 package and library but it seems to have vanished from either the CRAN or BioConductors sites. Can you tell me where it would be possible to find it or any R library (or function) able to read hdf files? Sincerely, Nicolas Degallier UMR 7159 / IRD UR182 Laboratoire d'Oc?anographie et du Climat, Exp?rimentation et Approches

Dear All, I'm new with mapping and using shapefiles in R. I use the version: R 3.2.1 GUI 1.66 with Snow Leopard Mac OS (6956) I want to build a map of the countries of Africa, in order to add points of collecting species of beetles, for later publishing. library(maptools) library(mapdata) When I put the extreme coordinates of Africa, the map began only at longitude 0? and thus lacks the

hello - a question about filled.contour plots, for which i haven't found a response in previous posts - sorry if already treated. i'd like to draw several filled.contour plots (that is, maps) on the same device (a postscript file, actually). I know about layout(matrix) , split.screen or par(mfrow) : it works well for simple plots, but with filled.contour plots, i get several pages

Hi listers, I want to make lattice plots xyplots with the indication of legends inside each panel with only the points and the lines actually ploted inside each given panel according to the group(ing) factor. The code below shows what I have achieved so far and I hope will make clear what I want to have. It seems to me that my solution is a very "dirty hack" and there certainly is

Dear All, After followed the help of nnet, I could get the networks trained and, excitedly, get the prediction for other samples. It is a two classes data set, I used "N" and "P" to label the two. My question is, how do I get the predicted numerical value for each sample? Not just give me the label(either "N" or "P")? Thanks! FYI: The nnet example I

I'm looking for a tutorial or notes on the use of contrasts factor in linear model in R, I've found some mails and infos about in various documents about R, but I've probably missed a good review on this subject. -- Robert Espesser Laboratoire Parole et Langage UMR 6057, CNRS 29 Av. Robert Schuman 13621 AIX (FRANCE) Tel: +33 (0)4 42 95 36 26 Fax: +33 (0)4 42 59 50

Hi, I am trying to install pdftools package on R 3.3.1 (Ubuntu 16.04), but the following issue occurs: ------------------------- ANTICONF ERROR --------------------------- Configuration failed because poppler-cpp was not found. Try installing: * deb: libpoppler-cpp-dev (Debian, Ubuntu, etc) * rpm: poppler-cpp-devel (Fedora, CentOS, RHEL) * csw: poppler_dev (Solaris) * brew: poppler (Mac OSX)

dear R-users, I have to model counts where all counts above some threshold have been censored. In the same dataset I have too many zeroes for a Poisson or even a negative binomial distribution to make sense, so I would need a zero-inflated-censored negative binomial family for use in glmer (or glmmADMB?). That seems not to exist. my question is : how could I add a custom-built family of

Dear all, I would like to solve a trivial problem (I guess it is) but can't find the right way. Maybe someone can help me ? I've got a table with two factors (station = station ID, buffer = buffer size in meters) and a value for each unique combination of those two factors (S = number of habitats within each buffer around each station) like this: TABLE 1 station buffer S Abaia01 200 2

Dear All I have problem with this: > IWJR.temp <-IWJR.missing[sample(1:length(IWJR.missing),1),] Error: subscript out of bounds How I can solved this. Thanks IRD

Hi Francois, Thanks for your quick response. Actually, I had already done that... sudo apt-get install libpoppler-cpp-dev Reading package lists... Done Building dependency tree Reading state information... Done libpoppler-cpp-dev is already the newest version (0.41.0-0ubuntu1.1). 0 upgraded, 0 newly installed, 0 to remove and 107 not upgraded. Therefore, I assume I have this installed. Best

Greetings, I am having trouble calculating artificial neural network misclassification errors using errorest() from the ipred package. I have had no problems estimating the values with randomForest() or svm(), but can't seem to get it to work with nnet(). I believe this is due to the output of the predict.nnet() function within cv.factor(). Below is a quick example of the problem I'm

He everybody, I want to add 1 to some elements of a vector: x is a vector u is a vector of idices, that is, integers assumed to be within the range 1..length(x) and I want to add 1 to the elements of x each time their index appears in u x[u]<-x[u]+1 works only when there are no duplicated values in u I found this solution: tu <- table(u) indices <- as.numeric(names(tu)) x[indices]

Full_Name: Emmanuel Paradis Version: 2.1.1 OS: Linux Submission from: (NULL) (193.49.41.105) read.fwf(..., header = TRUE) does not work properly since: 1/ the original header is printed on the console and not in FILE; 2/ the different 'parts' of the header should be separated with tabs to work with the call to read.table. Here is a suggested fix for src/library/utils/R/read.fwf.R:

Hi listers, A few days ago I posted a question about the use of the stars function on selected lines of a frame. Thanks to two helpers, a closer look at the scale argument allowed to partially solve the problem. Yet I still have a problem with stars. Allow me to explain what I intend to do (sorry for my poor English and the long post): I want to graph an activity index of a fish during the day

Hi ev'rybody, is there a way to pass a vector to a function expecting separate arguments? more specifically, I have a character vector, say u and I want a single string, but >paste(u) doesn't work, so I would like something like >paste(unvector(u)). I am interested in a solution to the general problem too, as the only one I found is maintaining two versions of the functions I

Hi, a colleague ran a stepwise discriminant analysis twice in a row and got different results, suggesting some "sochasticity" in the algorithms involved. I looked at her data and found that there was a lot of collinearity, so that I reckoned that maybe "stepclass" (klaR) cannot find a clear winner when trying to include a new variable and makes a random choice. Is that true?

Bonjour, Je suis actuellement doctorant (en fin de th?se) et je vais avoir besoin de me servir de R. Devant apprendre R tout seul, je suis tomb? sur un mail de vous disant que vous aviez r?aliser un tutorial sur ce logiciel pour des 100% d?butant comme moi J'aurai essentiellement ? utiliser des algo de clustering (SOM ou Nu?e dyna) sur des matrices pouvant faire 41x230 Cependant je