similar to: symbolic math

Dear All, I need to convert some Northing-Easting coordinates from the Gauss-Krüger system into latitude-longitude. Any suggestions on how to do it? Regards, Marco Marco Giannitrapani Statistical Consultant Tel: +44151373 5945 Email: Internet: http://www.shell.com [[alternative HTML version deleted]]

Dear R users. I was wondering if you could help me with this error message I get when I try to install packages. I just installed R (the latest version, R 2.2.0) on my laptop (windows), and I was trying to install packages intwo ways: 1) Packages > Install Package(s)... 2) Packages > Install Package(s) from local zip files... , but in both ways I get the following error message:

I needed a symbolic and algebraic computation software. The best solution I've found so far is maxima computer algebra system. I was wondering if there is any R package that has similar features as maxima's or somebody could point me to reference manuals on how to use R for this purpose. Thanks, Angel

Hi, I'm trying to use R to get eigenvalues and eigenvectors of a matrix whose elements are of the form (2 * lambda), -(lambda + mu), etc. I'd like R to treat this matrix as a numeric matrix without treating lambda and mu as variable names but rather as some sort of atomic quantities (and hence give eigenvectors in terms of mu and/or lambda). MatLab and Mathematica both do this,

Question for 'experts' in LP using R (using the lpSolve package, say) -- which does not apply to me for the sort of problem I describe below. I've run any number of LP's using lpSolve in R, but all of them to date have objective and constraint functions that both contain the same variables. This lets you set up a LHS and RHS matrix/vector that are symmetrical. But, for a

Apart from the fact that the statement "such that t1+t2+t3+t4=2970 (as it must)" is not correct, the LP can be implemented as follows: library(lpSolve) LHS <- rbind( c(0,0,0,0, 1, 0, 0,0), c(1,0,0,0,-1, 1, 0,0), c(0,1,0,0, 0,-1, 1,0), c(0,0,1,0, 0, 0,-1,1), cbind(-diag(4),diag(4)), c(0,0,0,0,0,1,0,0), c(0,0,0,0,0,0,1,0), c(0,0,0,0,0,0,0,1) ) RHS <-

>From time to time people request symbolic computations beyond what D() and deriv() etc can provide. A brief look at the internet shows that there are many more or less developed computer algebra packages freely available. Therefore, I wondered if it would be an idea to try to 'integrate' one of these packages in R, which I guess can be done in more or less elegant ways... I do not know

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 All, FXRuby version 1.4.2 is now available for download from this page: http://rubyforge.org/frs/?group_id=300&release_id=2738 Since this is the second release in this series (i.e. those compatible with FOX 1.4), it should still be considered unstable. Please report any problems either to the mailing list, or even better, log them in the

On 30/04/2014 12:50, Sylvestre Ledru wrote: > On 30/04/2014 12:42, Adam Strzelecki wrote: >> Hello, >> >> I don't know how it happened, but recent Ubuntu builds have broken -dev packages, which contain same libraries as non-dev packages. >> >> >> dpkg: error processing archive /var/cache/apt/archives/libllvm3.5_1%3a3.5~svn207603-1~exp1_amd64.deb

Hello, I have a big table with 3 columns and 103918 rows. This is the example,            time             species                 dbh 5 1 4.9377297 575 1 11.64127213 575 1 109.8182438 575 1 8.029809521 5 1 24.32501874 575 1 4.895992119 575 1 11.40567637 575 1 2.795090562 575 1 21.79281837 575 1 52.57476174 575 1 27.7290919 575 1 3.23262083 575 2 19.30612651 575 1

below is a code to compute hessian matrix , which i need to generate 29 number of different matrices for example first element in x1 and x2 is use to generate let say matrix (M1) and second element in x1 and x2 give matrix (M2) upto  matrix (M29) corresponding to the total number of observations and b1 and b2 are constant.  can some one guide me or help to implement this please. I did not

I am trying to write a function that will solve a simple system of nonlinear equations for the parameters that describe the beta distribution (a,b) given the mean and variance. mean = a/(a+b) variance = (a*b)/(((a+b)^2) * (a+b+1)) Any help as to where to start would be welcome. -- Scott Story Graduate Student MSU Ecology Department 319 Lewis Hall Bozeman, Mt 59717 406.994.2670 sstory at

Hi, I want to create a data frame similar to the following, but greatly scaled up: df <- data.frame(aaa= c("a","b","c"), integer(3), integer(3)) names(df)[2:3] <- paste("var",1:2,sep="") which yields aaa var1 var2 1 a 0 0 2 b 0 0 3 c 0 0 I would not relish having to paste 'integer(3)' 5000 times :(

Hi. I have repeated measures data of the form where each observation is a trial, and trials are grouped by subject, and variables encode whatever level of a factor was present during that trial, and the dependent variable is response time (RT). I want to transpose the data to a form suitable for MANOVA such that there is one observation per subject and RT is recoded across many

Dear All, I have been asked to forward to you this job advert. The advert is in Spanish as the role require knowledge of Spanish. If interested please contact Jimena at jimena.aldasoro-ext at novartis.com. Regards, Marco ######################################################################### - Puesto: Data Manager Estad?stico Marketing - N?mero de plazas: 1 - Tipo de contrato: Temporal

Hello, I am new to R and currently have the following problem: I have successfully loaded my data in R which consists of two numeric columns (LI_F and female) and one character column (Strain). So far I can plot two different set of boxplots for each of the numeric columns plotted by the groups of the character column and the commands look like that: boxplot(LI_F~Strain, ylab="LI_F",

Hello everyone, Source, binaries and docs for LLVM-5.0.0-rc2 are now available at http://prereleases.llvm.org/5.0.0/#rc2 (I'll add more binaries as they become available.) Please try it out, run tests, builds your favourite projects and file bugs about anything that needs to be fixed (including docs!), marking them blockers of http://llvm.org/pr33849. Cheers, Hans

Hi Folks, I am using Windows 2000 and was wondering what (Open Source) software R users use or might recommend for symbolic computations (aside from the ol' noggin, e.g., Maxima, Mathomatic) . Thanks, Hank Dr. Martin Henry H. Stevens, Assistant Professor 338 Pearson Hall Botany Department Miami University Oxford, OH 45056 Office: (513) 529-4206 Lab: (513) 529-4262 FAX: (513) 529-4243

Hi R-users, Can Maple function be exported to R? I have a jacobian matrix (4X4)?from maple in algebraic form which involve modified Bessel function of the first kind. I just wonder whether we can use algebraic form into R before the value of the parameters can be estimated. Thank you so much for your attention and help.

Hi @all, I've created a Distributed-Replicated Volume consisting of 4 bricks on 2 servers. # gluster volume create glusterfs replica 2 transport tcp \ gluster0{0..1}:/srv/gluster/exp0 gluster0{0..1}:/srv/gluster/exp1 Now I have the following very nice replication schema: +-------------+ +-------------+ | gluster00 | | gluster01 | +-------------+ +-------------+ | exp0 | exp1 |