similar to: Index alternative to nasty FOR loop?

Dear list, I'm trying to download a text file directly from the internet using the RCurl package and the command getURL. Duncan Lang graciously helped me solve the first step in this problem using the following command: ################# txtfile <- getURL('ftp://ftp.wcc.nrcs.usda.gov/data/snow/snow_course/table/history/idaho/13e19.txt', ftp.use.epsv = FALSE) #################

Dear List, I'm stuck on what seems like a simple indexing problem, I'd be very grateful to anyone willing to help me out. I queried a dataframe which returns a character vector called "plot". I have another dataframe from which I want to subset or select only those rows that match "plot". I've tried subset, and also the "which" command. plot

Dear list, After searching many old posts, I can't find the solution to a simple problem. can someone tell me how to create a character string with multiple backslashes, as in: file_dir <- c("C:\files\data\") I need to create this string and then paste it to many files names for batch processing in another software program. R won't accept the backslash and removes

Dear list, I'm trying to write my first looping function in R. After many hours of searching help files and previous posts, I'm at wits end. Please forgive my programming ignorance...any help is greatly appreciated. I need to sort through a vector (x) and identify the point at which 2 successive values become smaller than the previous value. I've written a "while"

Dear list, I am trying to download a text file from an ftp site using download.file(). I used the following code: url <- "ftp://ftp.wcc.nrcs.usda.gov/data/snow/snow_course/table/history/idaho/13e19.txt" dest <- "c:/test/downloadtest.txt" download.file(url, dest) I get this error message, indicating that R is unable to open the connection: trying URL

Dear list, I would like to plot 2 series of numbers with very different ranges/scales as lines on the same plot. I assumed this is commonly done and easy, but I have not found any help files (e.g. axis() or matplot() that show how. I've searched many old posts to no avail. I'll be very grateful for any suggestions on how this is done. Best, Zack

Dear list, Below I've written a clunky for loop that counts NA's in a row, replacing all with NA if there are more than 3 missing values, or keeping the values if 4 or more are present. This is sample code from a very large dataframe I'm trying to clean up. I know there are many simpler more elegant solutions to this little problem. Would someone be willing to show me how to

>I have a series of write statements because >i am writing to a file >where the characters strings are the column names of a dataframe >and the numbers are the elements in a particular row. >So, a file might look like > >AAA 2.1 >BB 3.1 >AHLZ 0.2 > >and it would be named "rowname".mls. > >so, each time i get to a new row, i create a new file and

Dear list, I've recently installed R on a 64 bit machine with 8 GB of RAM. I set this computer up as a dual-boot system, with windows XP 64 and Ubuntu 7.10. I downloaded the Linux 64 bit version of R and installed it. I'm trying to run rather large Random forest models and was running into severe memory limitations with my old windows 32 bit machines. When I run Random Forest models

Hi all I have made some changes to a package (SimHap) I wrote a couple of years ago, and it has passed R CMD check under windows, but under linux (ubuntu jaunty) I am getting the following error: * installing *source* package 'SimHap' ... ** R Error in parse(outFile) : 2:1: unexpected $end ERROR: unable to collate files for package 'SimHap' Does anyone know what the

Greetings R list, I am stuck on a simple syntax problem. I want to list all files in a directory, excluding files of a certain type. I have tried pattern matching as follows: a <- list.files(data, full.name = TRUE, pattern != ".xml") # exclude all .xml files The warning returns that my syntax is incorrect. I have read the regexpr help files and search old posts to no

Dear list, I'd like to use path.analysis in the package agricolae in batch format on many files, retrieving the path coefficients for each run and appending them to a table. I don't see any posts in the help files about this package or the path.analysis package. I've tried creating an object out of the call to path.analysis, but no matter what I try, the function automatically prints

Hola, Al intentar instalar un paquete de R creado por mí, me da el siguiente problema. Utilizando rstudio en local me funciona, pero al intentar instalarlo en rstudio-server es cuando me da este error. He probado cosillas que he leído en internet, pero no han funcionado. ¿Alguna idea? * installing *source* package ?mipaquete? ...** RError in parse(outFile) : invalid multibyte character in parser

Hello, I'm attempting to build a package using R 2.15.0 on OS X I am getting a generic failure when performing a cran type check on the package. Even with a very simple test package, it still fails int he same place. Example: In R: rm(list=ls()) foo <- function(x){print(x)} package.skeleton(name="foo") Then, at the command line: R CMD build foo R CMD check --as-cran

Dear all, I have an ASCII file where records are separated by a blank. I would like to read those data; however, only the data in rows 1, 3, 5, 7, ... are important; the other lines (2,4,6,8,....) contain no useful information for me. So far I used awk/gawk to do it: gawk '{if ((FNR % 2) != 0) {print $0}}' infile.txt > outfile.txt What is the recommended way to accomplish this in R?

Hi all, I'm trying to build a package on Windows 7 (64 bit) and although R cmd build worked fine and I got pkg.tar.gz with no errors, but when I tried doing R CMD check everything turns out ok except for the warning: "checking whether package 'pkg' can be installed ... ERROR. Installation failed." It then refers me to the error file "00install.out" which reads as

Dear list, I'm trying to query a string of numbers to identify where in the string the numbers stop increasing (where x[i] == x[i+1]). In example 1 below, I've adapted code from Jim Holt to do this. However, I run into situations where the condition is not met, as in example 2, where the number string is continuous. In this case, I need to specify an alternative outcome, where if in the

Hi Apologies in advance if I've missed something obvious. I have read the Sweave manual, the first article in R News, looked at the Help pages, googled Sweave and words like loop, output, files, multiple, done much the same on R site search (in case I missed something on Google) and I couldn't find exactly what I'm after. What I'm trying to do ?---------------------- Make

Hi guys, I can't see virtio in releng/9.1, is there any particular reason why it isn't going to be included given that it works reasonable well (and is optional anyway, so not likely to be detrimental)? Thanks, Joe

.PLS files should work for iOS devices. See sample text: [playlist] numberofentries=1 File1=http://91.121.91.172:31090/LG73 Title1=LG73 Vancouver's Best Music Mix! Length1=-1 Version=2 On Wed, Jan 20, 2016 at 1:27 PM, Holden Stanford <hstanford1 at gmail.com> wrote: > You can create a .m3u or .mp3 container linking to the stream URL. I can't > remember the exact tags