similar to: computing differences between consecutive vectorelements

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

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,

Dear R-users, When I call Rterm from cygwin, I have no options but typing the exact syntax the first time. If I happen to hit the "delete" key (backspace), R dies when I press enter saying : Error: ... (error concerning the function on the last line of text) Execution halted Perhaps some of you have experienced this and found work arounds? One has to be pretty good to type without

Dear list, I am facing a problem in my statistical analyses on R. My experiments are about plants, I record there growth after each cutting (every 3 weeks). 'BC' is for the plant, and '1' to '5' is the time of cutting and recording. The data and R script are : "" BourdCoup <- c(21, 7.2, 9.2, 0, 8.52, 14.7, 8.31, 6.2, 127.05, 115.2, 100.7, 24, 162.64, 136.8,

I have a somewhat related question. A while back I was doing some simulations using for() loops, and I wanted to keep track of the iterations using a line of code quite similar to what Dimitris presented below. Instead of printing the iteration message at the end of each iteration (actually, at the end of every 100th), nothing was printed until the for() loop was complete, and *then* all

hello, i'm quite a newbie to the mail server instalation and admin (you must start one day !) i would like to use a rapberry pi to build a system to get the mails from different mail accounts via pop, to store them in the raspberry memory an be able to get them with my thunderbird client on the different computers on my local network. no need to accesse them via internet it is for

Bonjour, Je fais suite au message que vous avez post? en 2015 : http://lists.alioth.debian.org/pipermail/nut-upsuser/2015-February/009568.html J'ai le m?me probl?me et ne trouve pas la solution. Comment vous en ?tes-vous sorti ? D'avance, merci pour votre aide. -- Cordialement Herv? BASTET Nouveau num?ro non surtax? 01 69 42 87 94 Ce message est prot?g? par les r?gles relatives au

unsubscribe -- -- JF Pion /*Marisol Touraine, Ministre de la Sant? ? propos du virus Zika:*/ *"Quand on a un projet de grossesse, il faut avoir des relations sexuelles prot?g?es parce que le virus peut se transmettre par la voie sexuelle. "* Oui, mais?enfin, s?rieusement quoi ? ?? elle r?fl?chit parfois ?? --- L'absence de virus dans ce courrier ?lectronique a ?t?

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

Dear R-users, There are tons of methods out there for fitting independant variables to a dependent variable. All stats books tell you about the assumptions behind OLS (ordinary least squares) and warn against abusive use of the method (which many of us do disregard by lack of a better knowledge). Most introductory text books stop there and don't tell you what the next best option might be. I

Hello, (Saddened for my bad English) I have just created a script to install NUT I manage the events with UPSSCHED and I would like to know how to launch this command via /etc/nut/upssched-cmd every 5 minutes to verify the level of battery of the UPS and decide on the action to be run. Is there an option in the configuration which I was able to forget? Other question : there is another command

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

????????????????????????????????? Chers correspondants, Bonjour ! Merci pour votre correspondance que vous envoyez ? mon compte depuis une tr?s longue p?riode. N?anmoins je dois vous dire que je comprends la langue anglaise que tr?s partiellement, aussi je ne retiens de vos ?crits que tr?s peu de choses. Par cons?quent, je vous demanderais de voir la possibilit? de me transmettre vos num?ros en

Hi everyone, I was working on the Paice-Husk Stemmer, which is a Bite Size Project for Xapian, and I have created a C++ as well as Snowball version of it. I read the algorithm, and picked the rules from here: http://www.comp.lancs.ac.uk/computing/research/stemming/paice/descript.htm The C++ code takes rules as input from a file and generates the stem of given word, whereas the Snowball version

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Hi, I'am using a Maildir++ based quota setting which creates a maildirsize file in every Maildir. The first two lines of this file are the maximum quota in bytes then the actual consumption in bytes and number of messages, like so : 1073741824S 379317999 5169 This means this user has a quota of 1Gb and he is using ~ 379 Mb (you have to divide by 1024 to be more precise) Since the

**************************************************************************** **************************************************************************** ************ Un message que vous avez envoy? ? jimmy@co-op.ca va possiblement ? l'encontre des politiques de s?curit? en vigueur ? la Coop?rative F?d?r?e. Informations sur le message DE : r-bugs@r-project.org ? : jimmy@co-op.ca Date :

Is it kosher to add, say, horizontal lines to a lattice xyplot using abline(h=xxx)? The lines don't appear at the right value, that is, if h=150, the line might appear at h=140? Jeff This communication, including any attachments, is intended solely for the use of the addressee and may contain information which is privileged, confidential, exempt from disclosure under applicable law or

Hi, I have a issue with OpenSSH 3.7.1p2 and crontab (solaris 8). The crontab will not execute correctly the commands if I edit it by using OpenSSH. client (Solaris 8 / Openssh 3.7.1p2) ---> server (Solaris 8 / Openssh 3.7.1p2). Next, I edit the crontab with "vi" using a console session and I save it without doing modification. The crontab works perfectly now ! ? I have

HI I have a problem compiling asterisk with imap When I enter this command *sudo ./configure --with-imap=/usr/src/asterisk-complete/thirdparty/imap-2007f/* * * at the end I allways receive this error *asterisk the IMAP TK installation appears to be missing or broken* * * i have looked a lot in the internet but I still cannot find the answer * * [image: dagoberto_ramirez]