Displaying 20 results from an estimated 110 matches similar to: "Help with modFit of FME package 2"
2011 Jul 28
2
Help with modFit of FME package
Dear R users,
I'm trying to fit a set an ODE to an experimental time series. In the attachment you find the R code I wrote using modFit and modCost of FME package and the file of the time series.
When I run summary(Fit) I obtain this error message, and the values of the parameters are equal to the initial guesses I gave to them.
The problem is not due to the fact that I have only one
2011 Dec 08
0
Fit initial time with modFit and modCost
Hello,
I would like to use modFit and modCost from the package FME to find
the optimal initial time t0 of a process. For simplicity, the process
is either "off" (value 0) or "on" (value h). So I have a data vector
with some zeros followed by some h's, e.g.
> c(0,0,0,2,2,2,2,2,2,2)
[1] 0 0 0 2 2 2 2 2 2 2
(hence h=2 here). I want to find the best guess for the initial
2012 Apr 26
0
Using FME modCost with multiple independent variables
I am attempting to calibrate a forest growth model using FME. I have
several spatially separate plots with time series growth data for
each(eg, height, basal area, etc.). Thus 2 independent variables: time
and plot.
Is there a way that I can calculate a model cost that takes into account
these different plots? I notice in the documentation for the modCost
function that there is a note
2013 May 02
0
modMCMC runs in FME package
Dear All,
please help with some thoughts on overcoming the following issues, if possible:
#R Code
require(deSolve)
require(FME)
pars <- list(k = 0.06,v=18)
intimes <- c(0,0.5,12,12.5,50)
input <- c(800,0,800,0,0)
forc <- approxfun(intimes, input, method="constant")
model <- function(pars, times=seq(0, 50, by = 1)) {
derivs <- function(t, state, pars) {
2012 May 18
3
Re: [XenARM] Regarding Xen-ARM for Cortex-A8 on Fast Model Emulators [FME]
Questions about the port of Xen to ARM with virt extensions are best
posted to xen-devel, the xen-arm list focuses on the PV port. Adding
xen-devel since it seems you are mainly asking about the
w/-virt-extensions port.
On Fri, 2012-05-18 at 12:38 +0100, Krishna Pavan wrote:
> Please inform the status of Xen-ARM for Cortex-A8 CPU''s on FME from
> ARM.
AFAIK no one has tried the
2011 Aug 04
1
use of modMCMC
Dear all,
I used modFit of the package FME to fit a set of ODE to a ste of eperiemntal
data.
The summary of this fit give me the following error
> summary(Fit)
Residual standard error: 984.1 on 452 degrees of freedom
Error in cov2cor(x$cov.unscaled) : 'V' is not a square numeric matrix
In addition: Warning message:
In summary.modFit(Fit) : Cannot estimate covariance; system is
2010 Apr 06
1
estimating the starting value within a ODE using nls and lsoda
All-
I am interested in estimating a parameter that is the starting value for an ODE model.
That is, in the typical combined fitting procedure using nls and lsoda (alternatively rk4), I first defined the ODE model:
minmod <- function(t, y, parms) {
G <- y[1]
X <- y[2]
with(as.list(parms),{
I_t <- approx(time, I.input, t)$y
dG <- -1*(p1 + X)*G +p1*G_b
dX <-
2004 May 30
1
What's wrong with this simple code???
Hi, all
I can not figure this out, please have a look and help me out.
thank you!
Note: this is in SPLUS, not R.
I have following code
***********************************
modfit<-function(yir,yew, ft) {
n<-length(yew)
yew<-yew[1:(n-1)]
yy<-yir-ft
xx<-yew-ft
n<-length(xx)
xx0<-xx[2:n]
yy0 <-yy [2:n]
xx1<-xx[1:(n-1)]
fit <- garch(yy0~xx0 + xx1+var.in.mean,
2011 Jun 03
0
Package dlm generates unstable results?
Hi, All,
This is the first time I seriously use this package. However, I am confused that the result is quite unstable. Maybe I wrote something wrong in the code? So could anybody give me some hint? Many thanks.
My test model is really simple.
Y_t = X_t * a_t + noise(V),(no Intercept here)
a_t = a_{t-1} + noise(W)
I first run the following code: (I shall provide data at the end of the
2002 Sep 25
10
Reading complicated data file
Hi, I am new in R and I have problem with reading this data file
0 TITLE Title
0 XLEGEND Legend
-1 LABEL x
1 1 12
1 2 30
1 3 34
I want to read only lines starting with 1 (it indicates 1st plotting line)
and create data set from second and third value on this row.
Thank for advice
Jakub Zlamal
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list
2006 Jan 14
2
initialize expression in 'quasi' (PR#8486)
This is not so much a bug as an infelicity in the code that can easily
be fixed.
The initialize expression in the quasi family function is, (uniformly
for all links and all variance functions):
initialize <- expression({
n <- rep.int(1, nobs)
mustart <- y + 0.1 * (y == 0)
})
This is inappropriate (and often fails) for variance function
"mu(1-mu)".
2011 Jun 03
0
How to reconcile Kalman filter result (by package dlm) with linear regression?
Hello All,
I am working with dlm for the purpose of estimating and forecasting with a Kalman filter model. I have succesfully set up the model and started generating results. Of course, I need to somehow be sure that the results make sense. Without any apparent target to compare with, my natural selection is the results by odinary least square. The idea being that if I choose a diffuse prior,
2006 Oct 31
0
6232309 need configurable limit on number of open FMEs
Author: jrutt
Repository: /hg/zfs-crypto/gate
Revision: 41d7d68d4ab013616c499ed0e497bffb54c8cc73
Log message:
6232309 need configurable limit on number of open FMEs
Files:
update: usr/src/cmd/fm/modules/common/eversholt/eft.c
update: usr/src/cmd/fm/modules/common/eversholt/eft.conf
update: usr/src/cmd/fm/modules/common/eversholt/fme.c
update: usr/src/cmd/fm/modules/common/eversholt/fme.h
2005 Nov 16
2
question
hi
I am a student in FME in Greece and with my friends, we try to make a
project in computer lesson.
We try to make a grid with some Pentium III and we use Knoppix Cluster.
But we have a surius problem.We can not make the other pc to boot over the
network because the bios of the pc do not support the network boot order.So
we thought to make some boot loaders but the think is that we dont know
2002 Feb 14
1
W2K problems
Hi,
I am in dire need of some help. I have no problems connecting to shares
with my W95/98 clients, but big problems with W2K.
The same username / password is used on both the PC and SAMBA (and NIS -
I am using Soalris 2.7 for my SAMBA server). When I try to connect to a share
from the W2K client, I get the message "Access Denied".
I have looked set nmbd / smbd to run at debug level 9
2013 May 27
0
fitting grid-based models
Hello!
I'm interested to fit parameters (to data) in a grid-based (individual)
model. If I understood well, simecol library has the fitOdeModel function
but it is only suited to odeModels (differential equation). Alternatively,
FME package has several functions able to perform this procedure but all
examples are for differential eq. models. It is mentioned in the that such
functions could
2008 Nov 02
0
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2009 May 26
2
using lsoda() and nls() together
Thanks to Dieter Menne and Spencer Graves I started to get my way through
lsoda()
Now I need to use it in with nls() to assess parameters
I have a go with a basic example
dy/dt = K1*conc
I try to assess the value of K1 from a simulated data set with a K1 close to
2.
Here is (I think) the best code that I've done so far even though it crashes
when I call nls()
2011 Feb 06
5
Help with integrating R and c/c++
Hi,
I have been using R for close to two years now and have grown quite
comfortable with the language. I am presently trying to implement an
optimization routine in R (Newton Rhapson). I have some R functions that
calculate the gradient and hessian (pre requisite matrices) fairly
efficiently. Now, I have to call this function iteratively until some
convergance criterion is reached. I think the
2003 Jun 26
1
HELP
I am including my config.log in the hopes that someone can tell me what
is going on with dovecot installing on Mac OSX 10.2.6
Sincerely,
?
Roger Cates, CCNA
Vice President & Chief Technical Officer
Xpower Internet, LLC
Xpowerhosting.com | Xpoweronline.com
P 888.245.7501 | F 270.338.4602
Internet to the power of X.
?
begin 666 dovecot_config.log