search for: brgm

...nuous. I ordered Venables and Ripley 2002, which I suspect is a sound reading for advanced stats with R, but it has not arrived yet and I need to move on asap. Any advice or pointer to the appropriate literature is greatly appreciated. Thomas Dr Thomas Dewez ENTEC Post-Doctoral Fellow ARN - MAS BRGM (French Geological Survey) 3 Av. C. Guillemin 45000 Orleans - France Phone: +33 (0)2 38644606 Fax: +33 (0)2 38643361 *** Le contenu de cet e-mail et de ses pi??ces jointes est destin...{{dropped}}

...ave Atkins, PhD University of Washington Message: 28 Date: Mon, 9 Aug 2004 11:26:08 +0200 From: "Dimitris Rizopoulos" <dimitris.rizopoulos at med.kuleuven.ac.be> Subject: Re: [R] displaying computation outputs inside "for" loops To: "Dewez Thomas" <t.dewez at brgm.fr> Cc: r-help at stat.math.ethz.ch Message-ID: <009101c47df2$e7e13430$ad133a86 at www.domain> Content-Type: text/plain; charset="iso-8859-1" Hi Thomas, is this what you would like to get, for(i in 1:3){ x <- rnorm(5) cat("the values of `x' are:", format...

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

Dear R-users, I am puzzled by for loops and am kind of ashamed to ask because it is so simple. There must be something I am missing in the way they are executed. Basically, I would like to iterate a given number of time and generate a bunch of stats (that's what loops are designed for, right?). Before doing this I simply want to test simple procedure and see if they work (ie got the syntax

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, I've been reading a bunch of things on linear models but cannot quite find a clear answer. How can one determine whether a linear model is significant or not? For background info, I am modelling the response of topographic slope to the distance of a catchment's outlet. Some guys have shown that if there is a significant fit to a linear model, one can deduce the dynamic

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 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

Hi all, I haven't been able to find how to assess a variable who's name is constructed with paste. The problem is following: In a data frame, there are 12 columns whose title vary only by a digit, all other part being equal. I would like to compute a operation on a subset these variables and parse them in turn. the data frame "basin.param" contains columns called ratio1,

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