similar to: R package equivalent to Excel SOLVER - Paquete R equivalente a SOLVER de Excel

Agradeceré me ayuden con la consulta: Cómo convertir un objeto data frame en una tabla csv que pueda a su vez ser convertida en un objeto geodata De antemano, gracias por la atención, -- Ricardo Bandin Llanos rbandin@udec.cl Estudiante - Magíster Cs. m. Pesquerías Universidad de Concepción, Región del Bio-Bio, Chile Celular: (0056-41) 97949957 [[alternative HTML version deleted]]

Deemed colleagues I would appreciate your help with a sentence to calculate the linear distance between 2 geographical points (coordinates in UTM). In advance thnks for your attention, -- Ricardo Bandin Llanos rbandin@udec.cl Estudiante - Magíster Cs. m. Pesquerías Universidad de Concepción, Región del Bio-Bio, Chile Celular: (0056-41) 97949957 [[alternative HTML version deleted]]

Dear colleagues I found duplicate coordinates trying to convert a dataframe object (see the attached file) into a geodata one ('geoR' package is needed). My dataframe object consists of 2 columns with UTM geographical coordinates and a 3rd column with fish densities . To overcome the handicap I must add a tiny value generated by rnorm() to each geographical coordinate. And it must be in

hi all members, please, i need you help... now a i´m working with veronoi polygons in a area with projections, but i need cut the polygons left. On other words, i need cut the polygons in the worked area. R help say that use the command voronoi.findrejectsites, but in this command i need put the numbers, any way...this command not cut!! do you can help me? Thank you for help me! José Bustos

Hi, everybody! I have been using samab on Debian for years and I have recently migrated my file server from version 3.0.14a-3sarge2 to 3.0.24-6etch4. One or our applications stores its data in a shared folder. This data is distributed in over 29000 files of about 1k-40k and is so much slower when it runs on the new server. I have thoroughly revised both smb.conf files, but can't see

(English Below)Estimados,  Acabamos de confirmar el lugar y la fecha del primer curso de R en Santiago, Chile. El curso se realizará el día Miércoles 9 y Jueves 10 de Marzo en las dependencias de la Facultad de Recursos Naturales de la Universidad Andres Bello, ubicada en República 440 (Metro República) El proceso de inscripción del curso se realizará on-line en el link que les adjunto. Además,

Hello, I am struggling with detecting successive digits in a numerical series vector. Here is an example: vec <- c(1, 15, 26, 29, 30, 31, 37, 40, 41) I want to be able to detect 29, 30, 31 and 40, 41. Then, I would like to delete the successive digits from the vector. 1, 15, 26, 29, 37, 40 Cheers -- View this message in context:

Dear all, This is a simple probability problem. I want to know, How to generate a normal distribution with mean=1, min=0.2 and max=0.8? I know how the generate a normal distribution of mean = 1 and sd = 1 and with 500 data point. rnorm(n=500, m=1, sd=1) But, I am confusing with how to generate a normal distribution with expected min and max. I expect to hear your directions. Thanks in

Just thought I'd ask. For those who've never seen TK!Solver, I strongly recommend taking a look. So far as I can tell, it's the only product of its type available, retail or open source, for any platform. What makes TK!Solver so cool is that it adaptively back-solves pretty much any unknown from any set of equations you give it. (or vector full of unknowns, producing a vector of

Buenas tardes: Quería lograr el efecto "expansivo" que se consigue con la opción paper="a4" de la función pdf, pero sin volcar en pdf; es decir, yo quiero enviar mi gráfico (luego definiré sus propiedades) a la salida gráfica (RGui) de modo que quede con verticalidad, como en un A4, y luego el usuario final es libre de guardar en pdf o no, con el propio RGui. Ahora voy a

I've uninstalled windows and this seems to be the final hurdle as there doesn't seem to be a comparable linux app (thermodynamics equation solver). I absolutely need this program for my engineering classes. Wine looks great, and the gui winetools is pretty neat too. While running the program i get: X Error of failed request: BadDrawable (invalid Pixmap or Window parameter) Major opcode

Hi all: I'm looking for a package that similar to solver in MS. All I need is find a r to satisfy R0=sum( r * Xt ), where t are from 1 to n and Xt are come from another formula. The most package I found were to max or min the obj. function. Is there any package can do it? Thanks. Peter [[alternative HTML version deleted]]

Hi, I did some googling. I found multiple ODE solver packages. But I am wondering if there is any terminal value ODE solver (linear case) for multi-dimension case or not? I have not come across any. Any guidance would be appreciated. Robert [[alternative HTML version deleted]]

Dear all, I want to work with R in an optimization problem and I was wondering if there are any available solvers. I found RCplex package but downloading it, I get problems. Why? Is it not free? are there any other solvers available? many thanks! -- View this message in context: http://r.789695.n4.nabble.com/Cplex-solver-and-optimization-in-R-tp3703385p3703385.html Sent from the R help

Hi, I can't seem to get any Excel Add-Ins to work. In particular, I need the 'Solver' for an assignment ... I've tried with two office versions (2007/2003), which I've managed to install successfully (you have to enable the Solver add-in during installation), but it's the same every time. When I try to start it up I get a message saying can't access SOLVER.XLA, and

Is there a package in R which implements numerically solves pde ? Thanks, Tolga

Dear R-Users, I'm searching for somebody who can support me or even likes to collaborate with me in setting up an R-package for "constrained maximim log-likelihood" parameter estimation. For example fitting the parameters of a MA(1)-APARCH(1,1) model for a time series of 17'000 points (e.g. the famous Ding-Granger-Engle mode) takes about 10 minutes with the existing

I can't for the life of me figure out how to get the roots for this simple (but sovable only iteratively) equation in R: x = z*(1-(1-2/z)^y where x and y are known, and z is unknown. In Matlab, this amounts to: [my.solution] = solve('x = z*(1-(1-2/z)^y') my.solution.real = solution(y-1,y) % bottom line displays non-imaginary solution (last element) Obviously, I'm deeply

Dear All, I was using rk4 and lsoda to solve a ODE system. However, both of them gave bad accurate solutions, especially compared with Matlab solver ODE45. For example, ODE45 gave solutions that can go to a stable level (about 1.6) when time goes to infinity, however, the solutions from lsoda are decreasing to very very small (about 1e-130) numbers. Does R have more accurate ODE solvers as

This is applicable to either using optim or the differential equation solver or any similar solver Suppose I want to use the differential equation solver and this is my code d<-y[2] vdpol<-function(t,y) { list(c(1, d, 3, 4 ) } stiff<-ode(y=rep(0,4),times=c(0,1),func=dvdpol,parms=1) The thing is I want d to be composed of one of state variables in the