search for: newtons

Greetings, I'm having a problem with configuring Samba. I am trying to connect to a linux box running Ubuntu with my os x laptop. When I try and connect I get prompted for a username/password. When I enter them apple gives me a weird error and it doesn't work. I'm pretty the problem is with my config on the linux side. The error log has this printed every time I tried to

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 <-

I 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

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 code)? I really

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

Hi, Is this method broken in R? I am using it to find roots of the following function: f(x) = 2.5*exp(-0.5*(2*0.045 - x)) + 2.5*exp(-0.045) + 2.5*exp(-1.5*x) - 100 It is giving an answer of -38.4762403 which is not even close (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

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 use

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) {  runi    <- runif(974, min=0, max=1)

Hi all, The PowerPC ELF backend of LLD is not in a particularly good state. It supports one relocation, has one test, and it does not seem to have received any commits other than tree-wide refactors 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

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 <-

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 this winter? Let ninemsn property help [[elided Hotmail

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 this winter? Let ninemsn property help [[elided Hotmail

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

Hi all, I am coding for finding the root of f(x)= phi(x) -alpha where phi(x) is the cumulative density function and alpha is constant . The problem right now is I can't get the "initialX" representing the root out of the while loop when ending , it seems to me it disappear when the loop ends accroding to the error message. I need help . Please suggest the cause or solution to this

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

I'm using Samba marked 2.999+3.0cvs20020723 from Debian `sid'. In smb.conf, I've got: passdb backend = ldapsam:ldaps://master.ldap.server 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