search for: newton

...fig on the linux side. The error log has this printed every time I tried to connect: [2006/09/07 13:09:24, 0] smbd/service.c:make_connection(851) daniel-bakers-c (192.168.1.3) couldn't find service home Here is all the things I could thing to test and include: -------------------- dan@Newton:/etc/samba$ smbclient //Newton/home/dan Password: Domain=[NEWTON] OS=[Unix] Server=[Samba 3.0.22] tree connect failed: NT_STATUS_BAD_NETWORK_NAME ---------------- Load smb config files from smb.conf Processing section "[printers]" Processing section "[print$]" Processing sec...

Hi r-users,   I have the following code to solve 4 simultaneous eqns with 4 unknowns using newton iteration method.  But I got the error message:   pars <- c(1.15, 40, 50, 0.78) newton.input2 <- function(pars) {  ## parameters to estimate      alp <- pars[1]    b1  <- pars[2]     b2  <- pars[3]    rho <- pars[4]   f1 <- pars[1]*pars[2] f2 <- pars[1]*(pars[1]+1)*pars[...

...have not included the previous postings because they came out very strangely on my mail reader. However, the question concerned the choice of minimizer for the zeroinfl() function, which apparently allows any of the current 6 methods of optim() for this purpose. The original poster wanted to use Newton-Raphson. Newton-Raphson (or just Newton for simplicity) is commonly thought to be the "best" way to approach optimization problems. I've had several people ask me why the optimx() package (see OptimizeR project on r-forge -- probably soon on CRAN, we're just tidying up) does n...

Hi, Is there available package on the optimization function using Newton-Raphson method (iterative quadratic approximation)? I have been using the 'optim' function in R and found it really unstable (it depends heavily on the initial values and functional forms). If I have to code it by myself, can I get some advice on how to start (any good reference or sample c...

Hi R-users, Does R has a topic on newton's method? Thank you for the info.

...(f(x) = 2.903809e+25 for x=-38.4762403). The answer should be around 0.01-0.1. This function should converge.. Even for a simple function like f(x) = exp(-x) * x, it gives answer as 8.89210984 for which f(x) = 0.001222392 and I set tolerance to 10^-12.. Also, is there a non graphical version of newton method? I looked at nleqslv but have no idea how to use it.. Thanks for your help. -- View this message in context: http://r.789695.n4.nabble.com/newton-method-tp2306111p2306111.html Sent from the R help mailing list archive at Nabble.com.

From: jypuppy36@hotmail.com To: r-help-bounces@r-project.org Subject: R programing help-newton iterations for the square root Date: Tue, 7 Dec 2010 12:00:01 -0800 NEWTON ITERATIONS FOR THE SQUARE ROOT Newton iterations to find the root of a real valued function f , i.e. a number x for which f (x) = 0, are of the form Example. To find the square root of a positive number y we can...

Hi r-users,   I would like to solve for z values using newton iteration method.  I 'm not sure which part of the code is wrong since I'm not very good at programming but would like to learn.  There seem to be some output but what I expected is a vector of z values.  Thank you so much for any help given.   newton.inputsingle <- function(pars,n) {  r...

...ctors since it was initially committed. It is also structured slightly differently to the other backends which means that refactoring patches that touch all the backends are made more difficult. Is anyone interested in maintaining this backend or would it be better to remove it? Thanks, -- Will Newton Toolchain Working Group, Linaro

Hi r-users,   I hope somebody can help me with this code. I would like to solve for z values using newton iteration method.  I 'm not sure which part of the code is wrong since I'm not very good at programming but would like to learn.  There seem to be some output but what I expected is a vector of z values.  Thank you so much for any help given.   newton.inputsingle <- function(pars,n) {  r...

I want generate R code to determine the real root of the polynomial x^3-2*x^2+3*x-5. Using an initial guess of 1 with Newton's method. Help please... -- View this message in context: http://www.nabble.com/Finding-root-using-Newton%27s-method-tp23534519p23534519.html Sent from the R help mailing list archive at Nabble.com.

Hello, Does anyone know whether the gls function in the nlme library uses the Newton-Raphson or EM algorithm to find the restricted log-likelihood or maximum log-likelihood estimates? Brendan Klick bklick@jhsph.edu [[alternative HTML version deleted]]

Hi, Does anyone know if there is a function to find the maximum likelihood estimates of glm using Newton Raphson metodology instead of using IWLS. Thanks Valeska Andreozzi -------------------------------------------------------- Department of Epidemiology and Quantitative Methods FIOCRUZ - National School of Public Health Tel: (55) 21 2598 2872 Rio de Janeiro - Brazil

Hi, Does anyone know how to code newton's method for finding the roots of polynomial functions? im not sure whether i need to do this manually, or just code something with a loop to stop when it gets to the desired result thanks guys! _________________________________________________________________ Looking to move somewhere new th...

Hi, Does anyone know how to code newton's method for finding the roots of polynomial functions? im not sure whether i need to do this manually, or just code something with a loop to stop when it gets to the desired result thanks guys! _________________________________________________________________ Looking to move somewhere new th...

Dear all, I want to solve a score function by using Newton-Raphson algorithm. Is there such a fucntion in R? I know there's one called optim, but it seems only doing minimizing or maximizing. Thanks, Jimmy

Hi, My name is Curtis and I'm a 1st year student in Biochemistry at the University of Geneva. I need some help completing the code for my NEWTON ALGORITHM. It is a bonus exercice to our autumn semester maths exam and we can hand it in or not. Usually people copy and paste but I decided to sit down and review theory and ask for help left right and center. My problem is that I cannot get my function to give me the solution. Here is my code:...

...n to this problem. Thanks. # code #generate target function (phi(x)-alpha) (allow input x and alpha) target<-function(x,alpha){ pnorm(x)-alpha } #generate the first derivative of the of the target function firstDerivative<-function(x){ exp(-(x^2)/2)/sqrt(2*pi) } # Finding the root by Newton method rootFinding<-function(initialX,setAlpha){ while(target(initialX,setAlpha)!=0){ initialX<-initialX-(target(initialX,setAlpha)/firstfirstDerivative(initialX) } initialX } -- View this message in context: http://www.nabble.com/Newton-method-iteration-problem-tf4701085.html#a13439031 S...

Dear Mr.Zeileis & all. (1)     Thx for your reply. Yes, I am talk about the function zeroinfl() from the package "pscl". I want to use Newton Raphson to get parameter             estimation ZINB, so I try this: ----------------------------------------------------------------------------------------------------------------------------------         > zinb <- zeroinfl(y ~x1+x2+x3+x4+x5|x1+x2+x3+x4+x5, data = dat, link="logit&quo...

...ldapsam:ldaps://backup.ldap.server tdbsam All works fine when both ldap servers are up, or when at least the first is up. When the first is down, though, samba tries to connect to it, doesn't manage to, and gives up instead of trying the next one(s). This is the log output: Oct 10 14:31:23 newton smbd[13549]: [2002/10/10 14:31:23, 0] passdb/pdb_ldap.c:ldapsam_connect_system(322) Oct 10 14:31:23 newton smbd[13549]: Bind failed: Can't contact LDAP server Oct 10 14:31:23 newton smbd[13549]: [2002/10/10 14:31:23, 0] passdb/pdb_ldap.c:ldapsam_getsampwnam(1206) Oct 10 14:31:23 newton smbd[1...