similar to: using Rterm under cygwin, no possiblity to delete characters

Dear R-users, I am a newbie to R so please excuse this naive question for which I couldn't seem to find online answers. I have this data frame containing a series of locations through time (x,y,z,t). I would like to compute the difference in x, y and z between t-1 and t. Sounds easy enough, but how on earth does one loop through vector elements and compute this difference? Thanks Thomas

well, sure diff() does it thanks alot Thomas > -----Message d'origine----- > De: Liaw, Andy [mailto:andy_liaw at merck.com] > Date: mardi 27 juillet 2004 16:50 > ??: 'Dewez Thomas'; 'r-help at stat.math.ethz.ch' > Objet: RE: [R] computing differences between consecutive > vectorelements > > > Not exactly sure what you want, but seems like you can

Dear R-users, I've spent most of the day reading R documentation at length but couldn't find something perhaps obvious. I have a dataset made of 3 morphometric variables for a series of watershed [log(slope); log(drainage_area); distance_to_outlet] My aim is to predict the value of log(slope) for pairs of [drainage_area; distance_to_outlet] (sounds like a plain linear model fitting,

In MS Windows I a) invoke Rterm from a batch file (test.bat) b) to execute commands from a script (m:\test.rsc) c) capturing output in a log file (m:\test.log) BUT if the script results in an error the error message is NOT written to the log file, leaving me problems when the error is from a complicated function. Simplified example:. test.bat ------------------------ REM ensure

Hi, I currently manage an environment where my Unix and Windows usernames are defined, but different. So, I must use a username map. But I have several Samba servers (one for each NFS package) and I must maintain all these username map files. As we want everybody to map the same way on every Samba servers in a NIS domain, we added the 'Windows user' information to the NIS

Dear List, After having installed R 2.6.0/Windows 2000, my trusted command script to build and install my package fails with an error message I do not understand. I have installed a fresh copy of Rtools, and made sure that these are the first on the path. For testing, I am using a package version from an older backup where I am sure that everything else was ok.

Hi, I could try latest 7zip (4.57) on a triple boot machine (Debian SID i386, x86_64 and native Windows XP SP2), and found something surprising in the results : amd64 at 2400MHz linux32 -> 1814 linux64 -> 1946 win32 -> 2004 So performance is much better in Linux 64 bit than in 32 bit, while both are slower than native windows system. Is it normal, I mean does anyone else obtain

Hi, I've recently moved my mailboxes to a NFS share (on an emc Celerra), and, as expected, the quota extensions no longer works. However, I've read that adding http://dovecot.org/patches/quota-rquotad.c to $DOVECOT/src/plugins/quota, adding a line to $DOVECOT/src/plugins/quota/Makefile.am and rebuilding, it should work again. Unfortunately, it doesn't compile in my RHEL 4.0:

Hi all, Thank you for your very useful product but I have a memory problem. I want use you product to migrate 4TB of data (in 150?millions files) When rsync make the list of files it full my RAM and after my SWAP and my server crash. I have 4GB of RAM and 4GB of SWAP Do you know what can I do?? Can I have an option to use an index on disk or something like this?? Thanks in advance

Dear R users, I am sorry to ask you such a pathetic newbie question, but how does one append data at the end of a data frame? I am working with GRASS/R library, but the question is about R. I have a data.frame containing the following variables basinID, distoutlet, drainage_area, slope These variables are stored for all pixels of Grass Raster objects. For each drainage basin (basinID), I'd

bonjour, je rencontre quelques soucis au niveau de l'utilisation des fonctions arima.forecast/predict; en effet elles sont dites inconnues alors que j'ai bien install?? et charg?? le package "ts". Aussi, j'aimerai savoir comment visualiser le graphique des pr??visions avec arima et celui des donn??es brutes dans la m??me fen??tre. Tout en vous souhaitant bonne r??ception

Currently, LogLevel must be set to VERBOSE to see the fingerprint of an accepted key, and the default LogLevel is INFO. Since this is useful security information, I would like to propose that the 'Accepted publickey' message be modified to include the fingerprint of the accepted key. Is this a reasonable solution? Here is an example log snippet with LogLevel VERBOSE: Oct 1 15:23:24

Hello I have two questions ! 1. What is the best speech recognition engine for asterisk? I have searched and asked on forums and found that lumen vox is best for asterisk bala bla bla 2. For TTS (text to speech) which TTS engine will be better to use ? I have tested Flite , cepstral (i have not buyed lisence for it trial only) but still thinking may be i have a good option ? -- Best Regards

Hello everyone, I just installed the CentOS 6.8 updates from the CR repository, and then I rebooted the server. I run some software to make weather images on a website, and I have run into a problem. When I do it, the software, as it tries to plot the image, says: Xwindow: unable to connect to display It just stopped working when I did the updates. Has anyone else seen this, or have an idea on

Hi all, I have a data frame with sequences of x and y from a map. I would like to know it both ways: 1. How to make a matrix from that; 2. how to make a data frame of all points in a map. Probably it is a silly question, but please tell me where to read about it or tell me how to do it. Miha Staut

Hello all, I'm having troubles getting R to load data from GRASS 7. I suspect I have installed something wrong, but can't figure out what. Any suggestions for what I could look for or how to trouble shoot this? Thanks in advance for any help! After having other issues last week, we have upgraded Debian to the testing version. The other problems are solved, but now I can't get

Hi Sorry for crossposting, but I think this can be of interest for GRASS and R users. I am planning to write a package to make the use of GRASS from R easier. The idea is to wrap the system call to execute the GRASS command into an R command of the same name. e.g: r.to.vect <- function(..., intern=TRUE, ignore.stderr=FALSE) { comm <- paste( "r.to.vect ", ...,

Hi, I'm running R 2.0 installed from the source port on FreeBSd 4.10 and I'm having trouble installing the GRASS package. Following is the procedure plus errors: > options(CRAN="http://cran.us.r-project.org") > install.packages("GRASS") <download snipped> downloaded 186Kb * Installing *source* package 'GRASS' ... ** libs cc

Hello. I am experiencing a problem with CentOS 3, it's that when I start Xwindow, my keyboard is lost and I can't do anything anymore. The Num Lock doesn't react nor the Caps lock. It's like if it would just be disabled. If I quit Xwindow, then my keyboard comes back again, working perfectly. Did anybody also have this problem ? I had a look elsewhere but didn't see anything

I am trying to compile the r.stream* set of addons. Ubuntu 9.10 64 bit I have installed the grass packages from the repositories I have also compiled grass 6.5 from source. I have taken the r.stream* from the addons svn and placed the sources in the grass source tree - in the raster file I run make distclean then navigate to the raster/r.stream* file run make and get this error message: